The engine has about 170k on it now. And it’s still shearing oil. I’ve had numerous UOA’s done which I can post from Blackstone and one from Polaris. The engine doesn’t have a dilution issue. So it seems to be coming down to heat even though the oil temps never go over 215 and that’s when the engines in a hard pull working and it takes a bit to get it there. Typical road temps are 175-180 for oil.
What I have done so far. The engine needed cam bearings already. At 100k we had bad samples coming back so I put in new cam bearings, shimmed the oil pressure regulator, changed the oil type and fuel filter type. Fuel filter was because I wasn’t getting any mileage out of the fleet guard. When I did the cam bearings I did the rod bearings as well. They weren’t bad but a couple had grooves in them, we contributed that to the shrapnel left from the engine grenading, so for piece of mind we swapped them, mains looked great.
The engine was broke in with Phillips 66 conventional as well as Chevron 15W40 conventional (switched brands to see if it still shears). When I did the cam bearings I switched to Kendall DXA (suggested by Phillips 66 as synthetic has better shear properties). The truck uses about 1/2-3/4 gallon in 10-15k miles and runs 58-62 psi oil pressure.
I’m considering an oil stabilizer to help. An engine builder friend from Australia said 20w50 is a better weight for high horsepower applications but it’s not readily available in the states unless you’re in the south. So an alternative thought was oil stabilization. I consider Lucas but my gut tells me not to. Doing some readin today it was suggested to use 80w90 gear lube instead of Lucas cause of the additive package in gear lube that Lucas does not have.
I reached out to Schaffer oil and the rep was pretty ignorant to be honest. He didn’t want any new customers and stated that he was struggling to keep the clients happy that he had. This has been a while but maybe that has changed. It has better shear properties than Kendall so I thought I’d consider it.
Any input on schaffers or the gear lube option?
What I have done so far. The engine needed cam bearings already. At 100k we had bad samples coming back so I put in new cam bearings, shimmed the oil pressure regulator, changed the oil type and fuel filter type. Fuel filter was because I wasn’t getting any mileage out of the fleet guard. When I did the cam bearings I did the rod bearings as well. They weren’t bad but a couple had grooves in them, we contributed that to the shrapnel left from the engine grenading, so for piece of mind we swapped them, mains looked great.
The engine was broke in with Phillips 66 conventional as well as Chevron 15W40 conventional (switched brands to see if it still shears). When I did the cam bearings I switched to Kendall DXA (suggested by Phillips 66 as synthetic has better shear properties). The truck uses about 1/2-3/4 gallon in 10-15k miles and runs 58-62 psi oil pressure.
I’m considering an oil stabilizer to help. An engine builder friend from Australia said 20w50 is a better weight for high horsepower applications but it’s not readily available in the states unless you’re in the south. So an alternative thought was oil stabilization. I consider Lucas but my gut tells me not to. Doing some readin today it was suggested to use 80w90 gear lube instead of Lucas cause of the additive package in gear lube that Lucas does not have.
I reached out to Schaffer oil and the rep was pretty ignorant to be honest. He didn’t want any new customers and stated that he was struggling to keep the clients happy that he had. This has been a while but maybe that has changed. It has better shear properties than Kendall so I thought I’d consider it.
Any input on schaffers or the gear lube option?
