[emperor91108]

I have new 383 stroker engine with a roller cam. So far I have been using 15-40 Rotella. I would like to start using a synthetic oil. Should I use 10-30, 10-40(hard to find), or 20-50. The 10-30 seems like the easiest to find followed by 20-50.

[97Z4C]

in all my 383s and most others--i use 10-30 fully synthetic valveoline

[keithl1967]

I have a 383 roller, and use conventional valvoline 20-50...

[Steiner]

Rotella T6 5W-40 has been getting good reviews on the bitog forums. Still has over 1000ppm zinc for now which is good even with a roller.

[quickboat]

Originally Posted by Steiner

Rotella T6 5W-40 has been getting good reviews on the bitog forums. Still has over 1000ppm zinc for now which is good even with a roller.

^^^^^I'm using the T6 also, great stuff!

[Steiner]

Originally Posted by quickboat

^^^^^I'm using the T6 also, great stuff!

Good to know. I've had a couple gallons sitting in the garage for a while but have a case of the Summit Racing semi-synthetic 10W-40 to burn up.