Who 's been using Xw40's in Xw30 spec motors?

[pidster]

Over the long term. HDEO's in particular, but any other experiences would be welcome. I had it in my head to try running an HDEO and it found troublesome to find any (I know they're out there though) in a 30, so I bought some Rotella T6 5w40. Found a great deal on it at the time so bought a bunch. First ran it in the old Tercel, right through the winter, could tell no difference whatsoever in ease of startup or fuel economy. Same deal in the Ranger, 3rd fill I decided to pour one of the other jugs of it I had, and I found it noticeably quieter and smoother sounding. No fuel economy difference that I can tell either. Bear in mind, I do and did park both vehicles in attached garage, both used block heaters and I do so much stop and go city driving it really is hard to calculate fuel economy to anything more than a general idea of how many clicks to a tank.

What say all of you out there? Should I continue my use of it past the last jug I have? Make the extra effort to find and try a 10w30 HDEO, try a Xw40 PCMO, or just keep trying different 5/10w30 PCMO's? The only reason I don't just keep using PYB 5w30 or the like is the definite, noticeable difference in sound and smoothness. It's not in my head, as stated I noticed no change in the Tercel doing this or any oil brand/type switch making any difference to this degree.

My theory is the Ranger just likes a little heavier of an oil, I'll probably experiment with a bunch of them anyways but thought I'd see what you guys all think, or recommend the next brand and viscosity to play with, anything 30 or 40 I'm comfortable running once.

 

[lewdwig]

I am using Schaeffers 9000 5W-40 in my daughter's Subaru Forester, no issues so far, previous fill was M1 0W-40. Wanted to try out the Shaeffers and got a good deal.

 

[HTSS_TR]

I used M1 TDT 5W40 once instead of 10W30 in Honda S2000 few years ago, it was recommended by Honda for colder climate. The engine was a little sluggish at RPM below 3.5-4k and fuel economy went from average 21-22MPG to 19-20MPG for mostly city driving.

 

[J_Sap]

I use Lubro Moly 5W40 in my Toyota MR2 Spyder. Runs better on this stuff than any 30 weight oil I have ever used and I plan on running this stuff again. I use it because it my engine gets a lot higher RPM's than the same engine would in a Corolla or Celica and expect it to protect better with the extra heat and high RPM's.

 

[Falcon_LS]

I'm using Liqui-Moly Synthoil Energy 0W-40 in my Grand Marquis. Whilst this application calls for 5W-20 in the US, it calls for 10w30 in the Middle East.

Over the course of the past 15,000 km (9,375 miles), it used about 300 ml of oil and I topped that up using Pennzoil LongLife Gold 15w40 HDEO.

Previously, this engine was run on Motorcraft Synthetic Blend 10w30, after which I also used Kendall Liquid Titanium GT-1 High Mileage 10w30. No difference in fuel economy or how the engine performs (doesn't feel heavy or anything).

 

[Bigsyke]

T6 in all my cars.

 

[robertcope]

I run M1 0W-40 in my '97 Tacoma and my '99 Miata, which I believe both call for xW-30. I run the M1 because I've got VWs that 'require' it, the Tacoma is supercharged, and the Miata is a track car, and it seems like one of best oils for all of these jobs. No idea if mileage, or anything else, has suffered, but nothing has blown up!

robert

 

[Familyguy]

Was using Rotella T6 5W-40 in my 1st gen DOHC Saturn and also in my 2.0 MK3 Jetta for a while. Nothing but good things to report. Cheap and readily available at Walmart.

Best,

 

[vinu_neuro]

I'm still debating between M1 0W-40, TDT and T6.

Here's the European oil chart from the service manual of my car. I've got an H22 in a Honda Prelude, note that they specify not to use 5w30 above freezing in Europe back in the day. I don't have the 97-01 North American chart, but I imagine it's similar:

92-96

Here's what we get:

92-96

97-01:

 

[Capa]

I've been debating switching from 5w30 to Mobil's 0W-40. I admit that the I am worried about a slight loss in MPG and whether Mobil's oil can handle a yearly OCI. I average around 8,000 miles in one car and 10,000 in the other. Would love to hear more from those who have made the switch. I know that the GS400 calls for a 30 weight but, if I am not mistaken, the Caravan 3.8 calls for 5W-20.

 

[vinu_neuro]

Originally Posted By: Capa
I've been debating switching from 5w30 to Mobil's 0W-40. I admit that the I am worried about a slight loss in MPG and whether Mobil's oil can handle a yearly OCI. I average around 8,000 miles in one car and 10,000 in the other. Would love to hear more from those who have made the switch. I know that the GS400 calls for a 30 weight but, if I am not mistaken, the Caravan 3.8 calls for 5W-20.


I'm probably going to switch to M1 0W-40 instead of the HDEO's mainly for fuel economy. M1 shears to a 30wt relatively quickly, but because of the base oil (is this still valid for this oil?) and additive package, it's still one of the best oils out there.

 

[SpitfireS]

Originally Posted By: HTSS_TR
I used M1 TDT 5W40 once instead of 10W30 in Honda S2000 few years ago, it was recommended by Honda for colder climate. The engine was a little sluggish at RPM below 3.5-4k and fuel economy went from average 21-22MPG to 19-20MPG for mostly city driving.

This was before your BITOG times I assume?

I mean... now you know Honda recommends a 5W-40 in colder climates because of the 5W... right?
Below -20C the 5W (eventhough its a 40 weight) would be thinner than the 10w30.

I also notice an improvement in my S2000 going from 0W-40 to 0W-30.
More rev happy.
Better cold starts - with the 2000 rpm Honda PGM-FI cold start.
Smoother running when not at operating temp.

 

[HTSS_TR]

Originally Posted By: SpitfireS
Originally Posted By: HTSS_TR
I used M1 TDT 5W40 once instead of 10W30 in Honda S2000 few years ago, it was recommended by Honda for colder climate. The engine was a little sluggish at RPM below 3.5-4k and fuel economy went from average 21-22MPG to 19-20MPG for mostly city driving.

This was before your BITOG times I assume?

I mean... now you know Honda recommends a 5W-40 in colder climates because of the 5W... right?
Below -20C the 5W (eventhough its a 40 weight) would be thinner than the 10w30.

I also notice an improvement in my S2000 going from 0W-40 to 0W-30.
More rev happy.
Better cold starts - with the 2000 rpm Honda PGM-FI cold start.
Smoother running when not at operating temp.

Yes, I tried M1 TDT 5W40 in 2005 before I joined BITOG in 2006.

I have a couple 5-qt jugs M1 0W30 I will use it in S2000 for the next oil change.

 

[oggb]

I prefer to run 15w40 or 5w-40 HDEO in my 5w30 specced Subaru. I also run 75w-140 in my 75w-90 specced rear differential.

Why?

Because.

 

[stranger706]

I ran T5 10w40 in our Explorer after I dumped the FF around 2500 miles. It was very quiet. Couldn't really tell any difference in MPG. No UOA.

I found the T5 10w40 jugs at the Tractor Supply around the corner. Walmart only has the 10w30.

 

[CBR.worm]

I do. 0w40 instead of 10w30 in the infinity.

T6 in the bike

I don't know what goes in the BMW. They come and pick it up/drop off a new one, then bring our car back with new oil and wiper blades, brakes, whatever it needs. I am going to be sad when the maintenance program runs out, but I do not think I will spend the $2,400 to extend it to 100k. maybe...

I have to say it is really nice not having to do anything to a car.

 

[5sfe91]

T6 in the 91 Celica(sig)
M1 0w-40 in the 05 Celica which is turbocharged

 

[rslifkin]

The Jeep is spec-ed for 10W30, I've been running the T6 5W-40 in it since I got it. It doesn't seem to care at all. Then again, the 360 isn't particularly hard on oil.