# Synthetic oil life inflation, caught in the act **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [June 16, 2026, 3:31pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872 "2026-06-16T15:31:18Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [June 16, 2026, 3:31pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/1 "2026-06-16T15:31:19Z")
Some product, same SKU, different copyright dates, same price. One says 10,000 miles, the newer one says 15,000 miles. The the more modern left package has a more minimalist design on the back with fewer words and less technical information, just like many modern websites. On the front, the mileage has been inflated. ![101_0054](https://global.discourse-cdn.com/cartalk/original/3X/a/1/a12040828bf4be7aaa42c6163e47276a8e27e06c.jpeg) ![101_0055](https://global.discourse-cdn.com/cartalk/original/3X/0/6/06e8271e79ff1388c27cb7a44ddb5020a4c6bf5e.jpeg) edit: Noticed the Renault specification is removed from the newer left side oil. Extended performance is now at 25,000 miles. I remember 20,000 miles from two years ago. ![101_0056](https://global.discourse-cdn.com/cartalk/original/3X/6/8/68603e6a3bf2d3bc61028cb232f369a71f7b38b8.jpeg) ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [June 16, 2026, 3:34pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/2 "2026-06-16T15:34:37Z")
> [@TheWonderful90s](#): > > Trying to attach images … says there was an error uploading my image file. I wonder what I can do. What can you do ? Don’t bother, the world has already had too many oil threads. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [June 16, 2026, 3:39pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/3 "2026-06-16T15:39:07Z")
Open the image on your computer. PC? Right click in the window background. Select “Save As” from the drop down. Look under the image name at the bottom, save as type- select .jpg or .png from the pull down menu… ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [June 16, 2026, 3:41pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/4 "2026-06-16T15:41:23Z")
> [@VOLVO-V70](#): > > What can you do ? Don’t bother, the world has already had too many oil threads. This kind of stuff is the exact reason why some members have decided to not participate here and move elsewhere. [TwinTurbo](https://community.cartalk.com/u/twinturbo), Thanks but it was a browser privacy extension issue that was messing up the upload of the file to the forum. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [June 16, 2026, 3:42pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/5 "2026-06-16T15:42:45Z")
Look at the API qualifications. The enhanced mileage one is rated to the latest standard SQ. The formulation of the oil may be no different but has been tested to the new standard. Or perhaps it is slightly different, allowing it to meet the more rigorous standard. > **[Understanding the New API SQ Category | Chevron Lubricants (US)](https://www.chevronlubricants.com/en_us/home/learning/from-chevron/personal-rec-vechicles-and-equipment/understanding-the-new-api-sq-category.html)** ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [June 16, 2026, 3:46pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/6 "2026-06-16T15:46:11Z")
> [@TwinTurbo](#): > > The enhanced mileage one is rated to the latest standard SQ. Which is a problem for anyone who doesn’t have a vehicle made for the SQ specification. I know the newer cars often have higher oil capacity which equates to longer oil life. It must be technically correct for them to remove the SN PLUS, SN, SM, and SL compatibility on the back of the newer package, since it is not rated for 15,000 miles for those vehicles. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [June 16, 2026, 3:48pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/7 "2026-06-16T15:48:47Z")
Note that all of these oils require changing after one year, so ‘25,000 miles’ is not that big of a deal. As for the change from 10,000 to 15,000, it’s a new spec, as noted above. I wouldn’t call it ‘inflation’, I’d call it ‘improvement’. They’re putting their money behind the claim, not a problem to me. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [June 16, 2026, 3:53pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/8 "2026-06-16T15:53:52Z")
> [@texases](#): > > As for the change from 10,000 to 15,000, it’s a new spec, as noted above. No! It’s a conspiracy.😉 ![image](https://global.discourse-cdn.com/cartalk/original/3X/d/c/dc6aedb7544e7d1b9ab0c1a749e539e0f689bb9c.png) ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [June 16, 2026, 4:01pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/9 "2026-06-16T16:01:03Z")
> [@TheWonderful90s](#): > > Which is a problem for anyone who doesn’t have a vehicle made for the SQ specification. ??? All API specs are backwards-compatible, so SQ covers all prior specs. I see no ‘problem’. ---
**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\ **Post date:** [June 16, 2026, 4:01pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/10 "2026-06-16T16:01:09Z")
> [@TheWonderful90s](#): > > since it is not rated for 15,000 miles for those vehicles Says who? Maybe it always was but they were limited to what they could claim based on the specifications at the time. Maybe they added something to the oil that allows it to suspend more particulates and so it lasts longer. Or the long chain polymer formula resists shear longer. I can think of many different ways this could play out. The SQ supercedes the prior SN et al meaning it is better in certain ways. Therefore it may very well allow for extended use in the legacy applications as well. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [June 16, 2026, 4:03pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/11 "2026-06-16T16:03:05Z")
I could even see the case where they changed nothing in the oil, but found through testing that it could handle a 15,000 mile/12 month OCI sufficiently well that they were willing to put their guarantee on it. What’s wrong with that? ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [June 16, 2026, 4:15pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/12 "2026-06-16T16:15:51Z")
> [@texases](#): > > What’s wrong with that? Nothing at all, if it’s true! If it’s mostly the same formula that now says 15,000 that’s the problem. I guess both versions need to be purchased and tested and all that. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [June 16, 2026, 4:21pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/13 "2026-06-16T16:21:28Z")
@TheWonderful90s you drive cars from the supposedly wonderful 1990s that most likely don’t even require this particular engine oil As such, I don’t see why you’re starting yet another oil discussion ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [June 16, 2026, 4:55pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/14 "2026-06-16T16:55:32Z")
Just asking for a friend but what kind of person would pay $70,000 for a piece of equipment and not change oil for 25,000 miles regardless of labels and advertising? ---
**Author:** ![LoudThunder](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/loudthunder/32/27769_2.png) [@LoudThunder](https://community.cartalk.com/u/LoudThunder)\ **Post date:** [June 16, 2026, 5:20pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/15 "2026-06-16T17:20:28Z")
> [@texases](#): > > They’re putting their money behind the claim, not a problem to me. Mobil also knows it is all but impossible to definitively say that the sole cause of the engine failure was their oil… Their Limited Warranty states: “If an engine _ **failure occurs directly due to a defect in the lubricant** _, ExxonMobil will pay to repair the equipment damage.” I think the “15,000 mile” pitch is more a sales tactic and not all that many folks will take them up on it and those that do are in many cases folks who would have run the “10,000 mile” oil that far anyway… ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [June 16, 2026, 6:13pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/16 "2026-06-16T18:13:17Z")
Notice in the top photos that the oil is Euro spec oil. The Euro manufacturers extended the change interval a while back to reduce pollution from spent motor oil. Also, I read test results from a government motor pool in California where they measured engine degradation in their fleet, which consisted of buses, large trucks, and even Chevy Cavaliers. In all cases they saw that they could extend the oil change interval substantially. Their reason for the test was to see if they could save money by reducing oil change frequency. That makes sense for a large motor pool. BTW, the Cavalier extended interval is 10,000 miles. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [June 16, 2026, 8:34pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/17 "2026-06-16T20:34:43Z")
Pollution from spent oil? Oil is now captured and recycled. For a normal consumer going from three to one change a year might save $100. It’s simply a cost vs risk calculation. ---
**Author:** ![ledhed75](https://avatars.discourse-cdn.com/v4/letter/l/f6c823/32.png) [@ledhed75](https://community.cartalk.com/u/ledhed75)\ **Post date:** [June 16, 2026, 8:39pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/18 "2026-06-16T20:39:34Z")
But wait… is it better to use dino or synthetic oil? Let’s reopen THAT discussion…(groan)… ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [June 16, 2026, 9:03pm UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/19 "2026-06-16T21:03:29Z")
If this study included Chevy Cavaliers, I’m thinking it wasn’t very recent . . . ? ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [June 17, 2026, 1:13am UTC](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872/20 "2026-06-17T01:13:54Z")
Yes, that’s true. My guess is that the study I read is at least ten years old. How does an old study reflect on its usefulness? [Next page](https://community.cartalk.com/t/synthetic-oil-life-inflation-caught-in-the-act/205872.md?page=2)