Quote:
Originally Posted by catmandoo62
i bought a suburban that was suposed to run on 5w30.it came out of arizona and evidently the guy thought he needed better oil pressure so he ran 10w40.it ate the oil pump.the ls engines use an oil pump like a transmission pump.it mounts on the front of the crankshaft.and they do not like thick oil.so i would shy away from it.
|
'better oil pressure' - is the bump on the 5 to 10 end or the 30 - 40 end that would cause the better pressure? If it is on the low viscosity end, then 10W30 would do it and be closer to spec, alternatively 5W40 wold be closer to spec that 10W40. I am guessing 'increased pressure' would come at the upper end, the spec relative to higher temps.