1990 GMC Sierra 5.7l 3,800miles 5w30

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Unfortunately I cant remember what oil I had in there this time, but I think it might have been maxlife.

Coolant level has stayed put since I did the intake. I was happy to see the UOA somewhat confirm this.

The power steering pulley broke off and the coolant temp needle was almost touching the red, I think thats about 260.

I changed the oil when the truck was dead cold and I had started it and shut it down quite a few times maneuvering in my driveway, so that could account for the extra gas.

The truck is slightly modded, its catless, dual exhaust, edelbrock intake manifold, lots of mods to the throttle body, and a cheap summit open air filter. I did all these mods at once at 102,390, so this is the second uoa with the engine mods.

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Originally Posted By: stubbakatt
Was Durablend used previous to the most recent run?


the 4683 mile run was half supertech 5w30 and the other half a mix of all the synths I had left, M1, PP, Castrol Syntec Edge.
 
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