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Wikipedia: same oil change interval synth & dino #4656207
02/04/18 07:35 PM
02/04/18 07:35 PM
Joined: Feb 2018
Posts: 3
California
windnsalsa Offline OP
windnsalsa  Offline OP
Joined: Feb 2018
Posts: 3
California
*2001 Tacoma v6 4wd [city driving within SF bay area, CA; less than 7000 mi/yr ; no 4wdriving ; never used synthetic]

I've been learning more about possibly switching to synthetic oil. Many people commented about significantly extending oil change intervals as one of the main benefits of synthetic oil. Wikipedia did mention that, BUT also stated for automotive use, the interval is the same between synthetic and dino oil. I do respect much of wikipedia, but know that it does have outdated/false info. Curious of wikipedia's statement.

https://en.wikipedia.org/wiki/Synthetic_oil

"For automotive use, the oil change interval for synthetic oils is the same as for conventional oil, typically 7,000 miles to 10,000 miles following the manufacturer's "severe service" schedule (which is the schedule that covers city driving). Oil needs to be changed because it gets contaminated with combustion by-products that accumulate at about the same rate regardless of oil type."

Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656216
02/04/18 07:44 PM
02/04/18 07:44 PM
Joined: Oct 2014
Posts: 11,827
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,827
Idaho
Yes


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656231
02/04/18 08:07 PM
02/04/18 08:07 PM
Joined: Dec 2009
Posts: 25,355
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 25,355
Regina, Saskatchewan, Canada
I would take that with a grain of salt. Obviously, some oil companies, including very big oil companies, stand behind their product for extended drains. Of course, there are certain things that have to be taken into account, including application and what's already specified in the first place, and what the intervals are already.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656264
02/04/18 08:30 PM
02/04/18 08:30 PM
Joined: Dec 2017
Posts: 394
Massachusetts
VeryNoisyPoet Online content
VeryNoisyPoet  Online Content
Joined: Dec 2017
Posts: 394
Massachusetts
All depends on application. If you regularly get the car up to full operating temperature such that moisture and vapors can be driven out of the oil, a synthetic will allow extended drain intervals. Short trips that never let it fully warm up, or severe duty such as towing, dusty roads, or 4wd excursions (this doesn't seem to apply to your driving habits here) suggest a shorter drain interval due to heat or contamination.

How many miles are on the vehicle currently? How often do you change the oil?


1998 V70 GLT / 192k miles [10w-30 Valvoline Syn w/ Maxlife Tech + Mann W917 filter]

"Use yah blinkah!"

"Be nice. The alternative involves an air horn and 7000 lumens of high beam."
Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656294
02/04/18 08:47 PM
02/04/18 08:47 PM
Joined: Dec 2011
Posts: 1,731
War Eagle
toneydoc Offline
toneydoc  Offline
Joined: Dec 2011
Posts: 1,731
War Eagle
Your main reasons to switch to synthetics are for better product purity and for extended drain interval

You can review many oil analyses on this website for both types of conv and syn oils.

Enjoy your research


1994 Jeep 159k Mobil 5000 5w30
2014 Camry 34k Havoline 5w20
2018 Jeep Cherokee 2k FactFill
2014 HD Ultra 40k Mobil1 15w50
2012 Rav4 37k Pennzoil Platinum 5w20
Re: Wikipedia: same oil change interval synth & dino [Re: VeryNoisyPoet] #4656315
02/04/18 09:06 PM
02/04/18 09:06 PM
Joined: Feb 2018
Posts: 3
California
windnsalsa Offline OP
windnsalsa  Offline OP
Joined: Feb 2018
Posts: 3
California
Originally Posted By: VeryNoisyPoet
All depends on application. If you regularly get the car up to full operating temperature such that moisture and vapors can be driven out of the oil, a synthetic will allow extended drain intervals. Short trips that never let it fully warm up, or severe duty such as towing, dusty roads, or 4wd excursions (this doesn't seem to apply to your driving habits here) suggest a shorter drain interval due to heat or contamination.

How many miles are on the vehicle currently? How often do you change the oil?


Past handful of several years have been city driving. Drive about 5k mi/yr. I've been horrible at doing oil changes and vow to change oil 1x/year (I should do it 2x/yr though but probably won't) since my DIY oil change about same time last year.

Planning to get a Fumoto type valve drain plug to make things a bit easier and less messy

Last edited by windnsalsa; 02/04/18 09:09 PM.
Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656327
02/04/18 09:19 PM
02/04/18 09:19 PM
Joined: Oct 2012
Posts: 4,601
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,601
Taiwan
Seems reasonable.

Oh wait...IF that were true, there goes the main/only advantage of synthetic oil. THE HORROR

So it can't be true, obviously.

Its what the Fukushima people called the possibility of a total coolant failure. UNTHINKABLE.

But if you think about it, (as they probably should have, but didnt want to) it'll probably depend partly on how fast your car dirties it's oil. A really clean runner with little blowby/EGR, or maybe an engine running on gas (meaning gas, not petrol) might be more likely to get some advantage.

Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656338
02/04/18 09:35 PM
02/04/18 09:35 PM
Joined: Dec 2017
Posts: 394
Massachusetts
VeryNoisyPoet Online content
VeryNoisyPoet  Online Content
Joined: Dec 2017
Posts: 394
Massachusetts
Oil analysis can tell you a lot about how your engine is doing, and whether you can extend your oil drain intervals. If water and fuel contamination is low and the wear metal counts are within tolerances, you can probably extend your interval beyond one year if you don't drive very much. Toyota claims 7500 mile intervals for normal service. They recommend oil change every 6 months (likely worried about contamination in infrequently driven and short tripped vehicles), but if the analysis comes back good, you can go further.

If you get it up to operating temp on most trips, try going one year and sending in a sample. Decide from there what the best course of action will be.

How many total miles are on the vehicle?


1998 V70 GLT / 192k miles [10w-30 Valvoline Syn w/ Maxlife Tech + Mann W917 filter]

"Use yah blinkah!"

"Be nice. The alternative involves an air horn and 7000 lumens of high beam."
Re: Wikipedia: same oil change interval synth & dino [Re: VeryNoisyPoet] #4656344
02/04/18 09:40 PM
02/04/18 09:40 PM
Joined: Feb 2018
Posts: 3
California
windnsalsa Offline OP
windnsalsa  Offline OP
Joined: Feb 2018
Posts: 3
California
oh, got about 115k miles on the Tacoma

Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656356
02/04/18 09:58 PM
02/04/18 09:58 PM
Joined: Dec 2017
Posts: 394
Massachusetts
VeryNoisyPoet Online content
VeryNoisyPoet  Online Content
Joined: Dec 2017
Posts: 394
Massachusetts
Quote:
oh, got about 115k miles on the Tacoma


Sounds like a good candidate for some kind of high mileage oil, especially if you notice any minor leaks or increasing oil consumption. Synthetic oil may clean away a layer of sludge around oil seals, causing existing leaks to worsen, or making new leaks appear where only the crud was stopping oil from escaping. They do not inherently cause the leaks, simply expose weak spots that would eventually leak anyway.

High mileage oils contain higher amounts of cleaning agents and chemicals to soften and recondition old seals, which can slow or stop some types of leaks, and prevent others from developing as the vehicle ages. Cleaning action could also help with oil consumption, if the problem is due to fouling in the piston rings allowing excess oil to enter the combustion chambers.

Semi-synthetic or synthetic blend is another option to consider, and most major brands carry syn blend high mileage oils. These may be less expensive than a full synthetic but offer benefits of better engine protection and the capacity for extended oil change intervals compared to a standard conventional oil.


1998 V70 GLT / 192k miles [10w-30 Valvoline Syn w/ Maxlife Tech + Mann W917 filter]

"Use yah blinkah!"

"Be nice. The alternative involves an air horn and 7000 lumens of high beam."
Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656385
02/04/18 10:34 PM
02/04/18 10:34 PM
Joined: Mar 2016
Posts: 1,226
CA
CharlieBauer Offline
CharlieBauer  Offline
Joined: Mar 2016
Posts: 1,226
CA
Run synthetic and get a UOA.

I would say CA's climate is conducive to getting the extra mileage that synthetic is capable of, but your engine and driving pattern may not allow that.


It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

- mistakenly attributed to Mark Twain
Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656470
02/04/18 11:59 PM
02/04/18 11:59 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: windnsalsa
Oil needs to be changed because it gets contaminated with combustion by-products that accumulate at about the same rate regardless of oil type


Nope.

"Read 'em & weep"

Amsoil SS 5w-20, 62,000 miles, '11 Ford Expedition
https://www.bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/4578469/

He IS running a bypass filter, though.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Wikipedia: same oil change interval synth & dino [Re: Linctex] #4656643
02/05/18 09:01 AM
02/05/18 09:01 AM
Joined: Oct 2012
Posts: 4,601
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,601
Taiwan
Originally Posted By: Linctex
Originally Posted By: windnsalsa
Oil needs to be changed because it gets contaminated with combustion by-products that accumulate at about the same rate regardless of oil type


Nope.

"Read 'em & weep"

Amsoil SS 5w-20, 62,000 miles, '11 Ford Expedition
https://www.bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/4578469/

He IS running a bypass filter, though.


Which IS a whole different ball game. Plus there's no control.

Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656649
02/05/18 09:11 AM
02/05/18 09:11 AM
Joined: Sep 2007
Posts: 967
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 967
TX, USA
For 5000 miles per year, use good dino and change it once a year.

If you drive more than that per year, then synthetic makes more sense since you can probably use it for 1 year OCI.
In reality, mild California climate probably will not add benefit to using synthetic like a place with subzero temp other than extended OCI.

This is assuming that synthetic and dino provides similar wear but in the long run, nobody will ever know.

Last edited by JMJNet; 02/05/18 09:12 AM.

  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Wikipedia: same oil change interval synth & dino [Re: windnsalsa] #4656681
02/05/18 09:50 AM
02/05/18 09:50 AM
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,652
Balearic Islands , Spain
Wikipedia is not somewhere i would go for advice on oil change intervals.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
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