0w50?

[ike84]

I have no objective reason to say this, but I like running 50wt oil in this car. I tend to run her hard and fast - yes I'm sure there's a joke in there - and rarely have rpms under 4k. When I started seeing bits of tensioner pads in my last oil change, I switched from mobil1 0w40 to Castrol 20w50. I swear the motor sounds and feels happier (yes I know it's a dumb thing to say). I'll be curious to see if there's more or less debris in the filter this time.

Anyway, here's the kicker - I'm moving to Minnesota. Yes, the state that in a single year has recorded temps over 100f in the summer and below -50f in the winter.

So, I've got to switch all my oils over to 0w (Duramax and vortec included). I see that mobil1 makes a full syn 0w50 racing oil. The stuff looks fantastic, with stupid high levels of zddp (enough to clog cats lol) and all the benefits of high weight with excellent cold flow. Plus, mobil1 actual recommends it for flat tappet engines.

Does anyone have personal experience with this oil in an m96? The only drawback I see would be the issue with cats, but I run aftermarket high flow cats that could be easily (and somewhat inexpensively) swapped out of it becomes a real problem.


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