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Is the recommended 0-20 bad for engine life?
- Thread starter Wolfkc
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It’s not anything I lose sleep over.
It's totaled.
And yet nobody has bought any of the pitchforks and torches I have on sale. As always, use code TvsT#myoilisbetterthanyouroil to unlock even more savings!
wemay
Site Donor 2023
No, it isn't "bad for engine life"
I bought 5w-20 in 1976, It was called Mobil1,
You missed my point?
I was responding the the guy who said he ran his 2003 forester on 0w20 since 5miles were on it... presumably in 2002.. which is impossible.(and a terrible idea for EJ series engines)
In my experience, the effect is still very small and swamped by ambient temps. I ran both 10W-60 and 0W-40 in my BMW S54 engine and the warm-up times to 100C were not significantly different.
It was an imported JDM 2.0, so no. Even had a lightweight flywheel and a catback.
5w20 for awhile into a 0w20 around 2016+, swapped the motor in 2017.
5w20 into 0w20. The shop doing performance work on my Nismo 370z stocked Amsoil and that was used for 4+- years. Prior it was whatever advanced auto had. Not bragging, simply stating a successful, extremely healthy motor that ran on 20 weight its entire life. The frame rusted out before the motor even thought about burning "too thin" of an oil. Im curious why everyone thinks you need a 30 or 40 in a daily driver making 50hp a cylinder or less
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It was an imported JDM 2.0. 5w20 into 0w20 was ran its entire life.
Here is the shop that got the JDM 2.0 - Moore Performance, you probably heard of them if you were into the subaru world in the early - mid 2000s. They were out of Pittsburgh PA. Mike at Innovative Tuning did all of their tuning before Cobb flew him to Texas to work for them. I think they might know a few things about JDM cars. https://www.legacygt.com/topic/102895-moore-built-forester-xti-5-speed-twin-scroll-622whp/
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XW40 in everything so we don't have to add oil between changes and the downstream emission control systems (cat, DPF & O2 sensors) last forever.
Walkback rejectedIt was an imported JDM 2.0. 5w20 into 0w20 was ran its entire life.
It was 20 years ago, but thank you for reminding meWalkback rejected
didnt know 5w20 all of a sudden became THAT much different- Joined
- Apr 16, 2024
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I don’t think it’s bad for engines since the wear metals rarely seem to be elevated even with heavier fuel dilution. I ran 0w-20 in my old Prius for 10k miles at a time and owned that car from 100k to 200k miles trouble free. But the new car is direct injected and turbocharged which is generally harder on oil and has me contemplating bumping to a 5w-30 at least in the warmer months (I usually get 2OCI in warm months and one in cold months).
And then I always go back to remembering the Hondas that get whatever the dealer has whenever the light comes on and still last and think my 5k intervals are more than adequate even with 0w-20. But the. 5w-30 doesn’t even trade off that much MPG. I’ve debated this a while, will probably just run 5w-30 the next OCI from mid summer to late fall and see how it is (I’m sure the butt dyno won’t be very useful)
And then I always go back to remembering the Hondas that get whatever the dealer has whenever the light comes on and still last and think my 5k intervals are more than adequate even with 0w-20. But the. 5w-30 doesn’t even trade off that much MPG. I’ve debated this a while, will probably just run 5w-30 the next OCI from mid summer to late fall and see how it is (I’m sure the butt dyno won’t be very useful)
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5W-20 != 0W-20
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