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#4697212 - 03/16/18 11:50 PM Changing my oil too infrequently? PCV problem?
BlakeB Offline


Registered: 09/20/17
Posts: 57
Loc: Southeast
I have a 2007 Toyota Tacoma with the 4.0 V6 (1gr-fe). It was bought in 2007 with ~3,600 miles, I used PYB 5w-30 for the first 30-35K at 5k intervals. Then I started using Mobil 1 5w-30 and later began using Mobil 1 5w-30 EP. I'll post a pic of the maint records, there are a few gaps in the records, that's where I have had work done at the Toyota dealer and had the oil changed by them with whatever dino bulk oil they had on hands. This isn't a complete list of all work done, I have some things that I have neglected to write down, but I have receipts with dates/mileages written on them in a folder. This vehicle is used daily and often short tripped (less than 1 mile), with lots of idle time. I have a stop or two to make in my daily 1 mile commute and I often leave my truck idling for a few minutes at each stop because it has not yet reached operating temperature, If I don't make any stops and just do my 1 mile commute my truck will be at about 140 degrees F when I shut it down. I do take a longer trip into town once or twice per week which can be a 20-60 mile round trip depending on where I have to go. I have an Ultragauge that I leave plugged in all the time to monitor engine and trans temps, I have alarms set just in case it ever tries to overheat, that way I'll catch it early enough to save the engine/transmission. The truck gets up to operating temperature fairly quickly and holds its operating temperature where it should be, usually 186.6, but with the heater running it'll drop down to 180 degrees F or so. In the summer with the A/C on and sitting still at idle I've seen up to 200 degrees F, but usually it doesn't get above 194. The PCV hoses/valve are original, but I have pulled the PCV valve off and checked/cleaned it several times, it seems to be functioning correctly and is not clogged. I'm gonna buy a replacement PCV valve the next time I'm at the dealer and swap it out.

Pics will be inserted at the bottom of this post.

My current fill is Pennzoil Platinum 5w-30 with a Toyota 90915-YZZD3 filter. I currently have ~148 hours of run-time on this OCI, with just over 1500 miles. According to my UG, I have burned about 143.5 gallons of gas on this OCI, averaging 11.1 MPG at an average speed of 10.7 MPH.

The oil looks great on the dipstick, but my engine continues to get dirtier....???

My previous fill was Mobil 1 EP 5w-30 (Toyota filter), which I ran for 6 months, ~2500 miles and for a total run-time of 185 hours.

The truck currently has 84,234 miles on it.

Although I couldn't get a picture of it through the fill tube (you can see it, I just can't get a pic of it), my truck is starting to get a lot of dark varnish buildup on the timing cover along with some streaky burnt looking places along the timing cover. I've seen this before.....

https://www.tacomaworld.com/threads/sounds-like-a-bad-pulley-wish-it-was.73107/page-3#post-1397889
....... I'm hoping I don't have a failing oil pump like that guy did.
The engine runs great, doesn't burn any oil and sounds normal. It has the typical 1gr-fe tick, but it always has.


I'm almost thinking I should be running a good cleaning dino (PYB, Chevron Supreme, Havoline) and change it every 100 hours, what do you guys think?













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#4697215 - 03/16/18 11:56 PM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
FermeLaPorte Offline


Registered: 07/25/17
Posts: 516
Loc: Texas (south)
Start with the obvious: Maybe buying a new positive crankcase ventilation valve and maybe check if the valves dnn't need adjustment.


Edited by FermeLaPorte (03/16/18 11:56 PM)
_________________________
Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

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#4697221 - 03/17/18 12:26 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
HondaBroMike Offline


Registered: 11/02/17
Posts: 312
Originally Posted By: BlakeB
I'm almost thinking I should be running a good cleaning dino (PYB, Chevron Supreme, Havoline) and change it every 100 hours, what do you guys think?



Wasn't aware PYB was that prolific at cleaning, did hear about the latter two though. To me, the problem child was the Mobil 1, where you stopped the PYB and switched to M1. I know this might come across as speculative but you never had the issues until you went full synthetic. Trying to surmise the culprit will be fleeting but just my 2 cents. I just cackled at how many fall out of their chair when they hear this but M1 and PP always burned for me whereas these new 0w-20s never do.


Edited by HondaBroMike (03/17/18 12:30 AM)
_________________________


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#4697227 - 03/17/18 12:34 AM Re: Changing my oil too infrequently? PCV problem? [Re: HondaBroMike]
BlakeB Offline


Registered: 09/20/17
Posts: 57
Loc: Southeast
Originally Posted By: HondaBroMike
Originally Posted By: BlakeB
I'm almost thinking I should be running a good cleaning dino (PYB, Chevron Supreme, Havoline) and change it every 100 hours, what do you guys think?



Wasn't aware PYB was that prolific at cleaning, did hear about the latter two though. To me, the problem child was the Mobil 1, where you stopped the PYB and switched to M1. I know this ight come across as speculative but you never had the issues until you went full synthetic. Trying to surmise the culprit will be fleeting but just my 2 cents.

I've read about PYB being a pretty good cleaning oil on here. I ran PYB for the first 30-35K miles. Mobil 1 From there until recently, with a fill or two of TGMO/dealer bulk oil in between. The current OCI is the only time I've ever ran Pennzoil Platinum in this engine. It's been slowly getting more and more varnished looking, particularly over the last couple of OCI's. The fill tube is currently the nastiest it's ever been since I put the PP in, I was getting a little of the rusty looking stuff on M1, but its a lot worse on the PP.

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#4697271 - 03/17/18 05:15 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
Bjornviken Offline


Registered: 12/06/17
Posts: 265
Loc: Finland
Tray a amsoil 5w-30 singature series

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#4697277 - 03/17/18 05:41 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
MParr Offline


Registered: 10/28/17
Posts: 553
Loc: Georgia
Iíve used quiet a bit of Pennzoil and the brown baked on coloration is typical. Just look at the oil as it comes out of the bottle. If you like using conventional oil, switch to Valvoline, Motorcraft or Havoline. Change out the pvc valve and plumbing.
_________________________
2013 KIA Optima EX 2.4L. Now: Castrol Magnatec GTX 5W30 synthetic & STP S2808ML
2017 Ford Escape SE 2.0T Now: Pennzoil Platinum 5W30 & Motorcraft 910s

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#4697283 - 03/17/18 06:06 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
dlundblad Offline


Registered: 09/30/13
Posts: 10214
Loc: Indiana
Originally Posted By: BlakeB
averaging 11.1 MPG at an average speed of 10.7 MPH.


I am not seeing any problems per se, but I would get her out on the highway more with a few WOT's. Heck, just allowing it to get to and run at operating temperature would be beneficial.

No choice of oils be it conventional or synthetic caused any issues with your truck, but with your driving style, I would use conventional and keep the OCI's short. No more than 5000. Once again, get it out on the highway more.

A new PCV system certainly wouldn't hurt, but I am not seeing an issue there.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980


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#4697301 - 03/17/18 07:08 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
Triple_Se7en Offline


Registered: 12/04/04
Posts: 8956
Loc: 1/2 hr. north of Detroit
Blake
Have your oil analyzed. That's the only way to find out if oil brand is your problem.... pcv .... or the engine.


Edited by Triple_Se7en (03/17/18 07:08 AM)

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#4697304 - 03/17/18 07:16 AM Re: Changing my oil too infrequently? PCV problem? [Re: dlundblad]
BlakeB Offline


Registered: 09/20/17
Posts: 57
Loc: Southeast
Originally Posted By: dlundblad
Originally Posted By: BlakeB
averaging 11.1 MPG at an average speed of 10.7 MPH.


I am not seeing any problems per se, but I would get her out on the highway more with a few WOT's. Heck, just allowing it to get to and run at operating temperature would be beneficial.

No choice of oils be it conventional or synthetic caused any issues with your truck, but with your driving style, I would use conventional and keep the OCI's short. No more than 5000. Once again, get it out on the highway more.

A new PCV system certainly wouldn't hurt, but I am not seeing an issue there.

It has never had an OCI of more than 5,000 miles and has been on synthetic oil for the last 50,000ish miles (besides the once or maybe twice that it's had conventional in it since I switched to synthetic). My last (previous) oil change with Mobil 1 Extended performance was dumped after 6 months and about ~2,500 miles with 185 hours of run time. Sometimes I drive more than others, but I usually don't drive more than 5-6k per year. I know that short trips are hard on vehicles, but I do try to get it up to operating temperature and keep it there for a while when I can. I also know that idling isn't particularly good for vehicles, but I think it might be better than shutting them off before they've had a chance to reach operating temperature?
I think the question is, is my sludging/varnishing a result of repeated short trips/low average operating temperature, or would a shorter OCI prevent the sludging/varnishing? Some high mileage oils claim to have more detergents in them to fight sludge/deposits, maybe I should start using a HM oil. WM has Valvoline synthetic HM on sale right now, which is claimed by Valvoline to have more detergent in it than their standard oils.

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#4697311 - 03/17/18 07:31 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
Oldtom Offline


Registered: 07/05/14
Posts: 343
Loc: Cecil County Maryland
How about installing a Fram Ultra and a Fumoto drain valve? Leave the Ultra on for a full year, but change the dino oil three times a year. The Fumoto will make oil changes quick and easy. Use any dino with a reputation for cleaning.

Do change the PCV valve. The PCV on my Dodge Caravan still rattled when shaken, but, a new Mopar PCV cut oil consumption down to nothing. Also, the oil seems cleaner at the same mileage.

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#4697343 - 03/17/18 08:13 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
MobilinHyundia Offline


Registered: 09/27/10
Posts: 368
Loc: Ontario, Canada
15 000 oil changes on my 2.4l Sonatas and engine have no brown varnish.
Why?
_________________________
2009 Sonata GL 2.4L (226000km)-QS FS 5W20 ,OEM oil filter
2009 Sonata LTD 2.4L (170000km)Castrol Egde 5W20, RP filter

24000km/15000 mile oci so far

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#4697361 - 03/17/18 08:32 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
DuckRyder Offline


Registered: 10/20/05
Posts: 4258
Loc: Atlanta
The coolant temperature may get up to operating, but the oil temp is never making it...

This is the way it is going to be unless you change the operating cycle IMO.
_________________________
Robert
  • 2007 Toyota Prius Touring
  • 2005 Honda Civic Sedan
  • 1972 Ford F100

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#4697396 - 03/17/18 09:12 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
JLTD Offline


Registered: 12/15/17
Posts: 837
Loc: US
Short trips, never up to operating temp - that's the definition of "severe".

Only with a UOA can you know for sure if the oil is still good.
_________________________
Hers: 2008 Jeep Liberty 135k, AMSOILģ SS 5w30/same

His: 2015 4Runner SR5 1GR-FE 39k, AMSOILģ OE 5w20/Wix

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#4697409 - 03/17/18 09:33 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
NYSteve Offline


Registered: 12/26/06
Posts: 458
Loc: Killadelphia
Originally Posted By: BlakeB
about ~2,500 miles with 185 hours of run time.


This right here man. 6months of 12mph trips where your **coolant** gets up to temp but your oil does not.

I can't find the chart but it's been posted before that your oil needs another 10-20 minutes to get to full temp than your coolant.

With your short trips, your coolant is just barely up to temp and your oil not.

Also, idling is fine for vehicles. Source - multiple public service roles, never seen an vehicle quit due to idling to much.

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#4697446 - 03/17/18 10:08 AM Re: Changing my oil too infrequently? PCV problem? [Re: BlakeB]
MParr Offline


Registered: 10/28/17
Posts: 553
Loc: Georgia
BlakeB
That coloration is the result of Pennzoil YB for the early part of itís life. Go to Valvoline conventional and change at 3,000 miles. Iím not knocking Pennzoil, it is what it is. Itís not sludge and itís lubricating as it should. Open up a bottle of Pennzoil and notice the color. Pour in into another container and look at the residue left in the original bottle.
_________________________
2013 KIA Optima EX 2.4L. Now: Castrol Magnatec GTX 5W30 synthetic & STP S2808ML
2017 Ford Escape SE 2.0T Now: Pennzoil Platinum 5W30 & Motorcraft 910s

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