I'll repeat. After several 3 to 4000-miles OCI's of vanilla M1 5W-30, accompanied by nominal Alaska summer, 60 to 70-degree day commuter highway driving (110-mile RT's between Anchorage and Palmer, Alaska), my L59 V8 was lost. For this engineer and technical systems manager, if I can remove certain important operating factors that
MAY have led to an engine's premature demise, I will do so. It's completely understandable why I will not continue to use said product in my GM V8 engines going forward.
I'm sorry if you or others do not like this situation, and that others have had the same problem as noted here -- an engine destroyed with nilla M1 5W-30 in the sump. Blather all you want. It is what it is.
Thankfully, my second L59 V8 is behaving nicely, my GM half-ton truck now has nearly 200,000 hard Alaskan miles on it (roughly 65,000-miles on the new engine). It's a kept or maintained vehicle with little rust (no salt used here). My family enjoys this well-behaved and maintained 4WD pickup truck. I expect another 100,000 miles from her.
My last GM product, a 1993 Olds Bravada with the W-code 4.3L, ran 285,000 hard Alaskan miles before I sold it to a teenager to destroy. Let's see... that SUV was NEVER garaged either. It started every winter morning totaling a cumulative 10-years in the cold (lived on Valvoline Durablend most of its life). That wonderful Bravada also made 7 each 3,500-mile trips up and down the Alaska-Canada Highway (the Al-Can), between the Lower-48 states and Anchorage. Two of those 7 trips were accomplished in the dead of winter, with temps of -20 to -35 degs F... driven through for hundreds of miles along the way (really cold wx between Whitehorse (Yukon Territory) and the Glennallen, Alaska areas).
Let's see your Jeep/RAM products last that long.
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