Quote from: SHOdded on March 22, 2019, 04:42:02 PM
Mike, do you remember WHEN you purchased the 0W30 formulation. I believe the pre-Nov 2017 formulation had some ... issues ... with regards to volatility etc.
Indeed! Looking back at my Amsoil order history, this is what I found:
Case ordered Feb 2017 (~15k miles)
6 qts ordered Jan 2018 (~7500mi)
Case ordered Jun 2018 (~15k miles)
6 qts ordered Mar 2019 (just before timing chain replacement, still have)
So, I would have gone approx 15k miles on pre-Nov 17 0W30 SS, and just under 37.5k miles (tuned) in all on 0W30.
I'm planning to exchange the stuff I just bought. Now that I'm back to stock, I'll just stick with mfg recommended 5W30.
Additionally, I had been going 7500mi between changes, and I think I'll revise that to 5k. Funny thing is looking at the onboard oil monitor, it wouldn't have me changing until a 10k interval. That seems insane, especially on the OEM filter.