Is Rotella T6 ok for my engine

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Ok,

I posted a while back about bad hot idle pressure on my ls3 stroker. I recently swapped to a cooler thermostat and reprogrammed the fans to match the new thermo and keep water temps around 175-180. My oil pressure has picked up a good 5 to 8 psi at idle now, and oil temps are setting a bit better around 200 degrees now. Anyway im considering the two rotella oils for use in my car. Either 15w-40 conviental or 5w-40 t6 i live in southern indiana and want to be able to drive the car on the occasinoal cool morning here like 25 degrees on occassion. I change the oil often every 2500-300 miles typically. would either of these oils work well?
 
Yes either one of them would work if using the thicker 15w40 more warm up time should be used and mileage will most likely suffer too,if your worried about that.

more importantly tho have you pinpointed the problem of the low oil pressure? this sounds like a build engine.
 
i think its just the clearances in the block opening up at 205 degree water temps honestly. It is a heavly built LS engine. It has an ERL Superdeck system in it 4.155 bore x 4 inch stroke so 434 cubic inches, ported heads, fairly agressive roller cam, all forged internals and bearing clearances right around .0020 using acl race pro bearings. It makes roughly 620-640hp.
 
Originally Posted By: rennocneb
i think its just the clearances in the block opening up at 205 degree water temps honestly. It is a heavly built LS engine. It has an ERL Superdeck system in it 4.155 bore x 4 inch stroke so 434 cubic inches, ported heads, fairly agressive roller cam, all forged internals and bearing clearances right around .0020 using acl race pro bearings. It makes roughly 620-640hp.


Whoa. Would love to see some engine bay pics.
 
its in a g8 it just looks like a stock LS3 looking at it. Though when you crank it up it tends to get noticed. right now ive been running VR1 20w-50 in the engine for breakin back in warmer weather but id like to get something in it a bit more fitting for the weather we are having now.
 
Originally Posted By: rennocneb
i think its just the clearances in the block opening up at 205 degree water temps honestly. It is a heavly built LS engine. It has an ERL Superdeck system in it 4.155 bore x 4 inch stroke so 434 cubic inches, ported heads, fairly agressive roller cam, all forged internals and bearing clearances right around .0020 using acl race pro bearings. It makes roughly 620-640hp.

All that work and the engine builder didn't put in a good oil pump(high volume),I'm sure bearing clearances are on,but boy oil pressure should be number one priority in that mill.

I'd be a little upset with money spent and have that issue. how's off idle OP??
 
it has a melling 10295 which is a very good high volume and high pressure pump. It has good pressure off idle. hot temps it makes 40+psi at 1300-1400 rpm cruise. it has 20-30 hot idle depending on oil temp and engine oil used.
 
in summer heat i was seeing about 24psi hot idle using the VR1. now about 28 to 30, but thats dropping the watwer and conversly the oil temps about 15-20 degrees.
 
I don't think you'll loose much,look for the highest cSt 100c(hot viscosity) spec between oil's you want to run.
 
Originally Posted By: rennocneb
Ok,

I posted a while back about bad hot idle pressure on my ls3 stroker. I recently swapped to a cooler thermostat and reprogrammed the fans to match the new thermo and keep water temps around 175-180. My oil pressure has picked up a good 5 to 8 psi at idle now, and oil temps are setting a bit better around 200 degrees now. Anyway im considering the two rotella oils for use in my car. Either 15w-40 conviental or 5w-40 t6 i live in southern indiana and want to be able to drive the car on the occasinoal cool morning here like 25 degrees on occassion. I change the oil often every 2500-300 miles typically. would either of these oils work well?
Of your choices, I'd run the 5W40.
 
Originally Posted By: rennocneb
i think its just the clearances in the block opening up at 205 degree water temps honestly. It is a heavly built LS engine. It has an ERL Superdeck system in it 4.155 bore x 4 inch stroke so 434 cubic inches, ported heads, fairly agressive roller cam, all forged internals and bearing clearances right around .0020 using acl race pro bearings. It makes roughly 620-640hp.


Solid or hydraulic roller??

+ Another vote for the T6 (or maybe the M1 0W-40).
 
To be honest, 20+ psi at hot idle is enough, IMO. I'd give the T6 a shot, and as long as it doesn't drop super low, you've got nothing to worry about. Most engines don't need a whole lot of pressure until you put a load on them, and if you're making 30-40 psi by 1400 rpm, I don't think there's anything wrong.
 
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