best oil and weight
#3
Senior Member
EXPERT BUILDER
Join Date: Jan 2005
Posts: 336
bearing dimensions will have big part on which grade of oil to run.sloppier bearing clearances use thicker oil.tighter bearing equals thiner..etc...if running flat tappet cam zinc and phosphorus additive is GOOD to use
#5
Senior Member
EXPERT BUILDER
Join Date: Jan 2005
Posts: 336
i would consult with your engine builder!!!!!if you built motor yourself,oil pressure would be a good sign of which grade oil.solid roller means no need for zinc or phosphorus.i run castrol 20-50 fossil oil in my roller 572.but i drain it out often.
#7
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Originally Posted by hammertime
VR1 Valvoline racing oil 20/50 I am going to try the 10/30 this year also.
If I could get the Brand Penn easier then I can I'd try it also.
If I could get the Brand Penn easier then I can I'd try it also.
Ain't that the truth, Brad Penn can be bought on Ebay for $45.00 a case but the shipping is $23.00, there's no place in La. that i can find that sells BP, so i' stuck useing other products.
Zip.
#10
Senior Member
MASTER BUILDER
Join Date: Dec 2005
Location: alberta,canada
Posts: 166
I think one responds was mising in this discusion and that is high volume oil pumps as if u have a 2 tight bearing clearnce u might not be able to tun high volums oil pumps and only a standarn pump as the the bearing clearnace didcates wieght of oil and what oilpump u run.............as lower bearing clearnce will need lower weight oil and not high pressure pumps to get it through the smalller clearnces were the higher beary clearnces not heavy oil viscoity and the higher voulume pump................if you disgree with plase feel and explain to me were my thinking has gone wrong.............thanks al..
main bearing with a 2 thou clearnce with use a standard pumpwith alighter oil like a 15-40 or a 10-30
mainberaing with a 3+ thou clerance with use a higher volume oil pump and higher oil like 20 50 wieght.................i have also that for every ten degree hotter u r installing your bearing grow 1 thou....................foood for though
main bearing with a 2 thou clearnce with use a standard pumpwith alighter oil like a 15-40 or a 10-30
mainberaing with a 3+ thou clerance with use a higher volume oil pump and higher oil like 20 50 wieght.................i have also that for every ten degree hotter u r installing your bearing grow 1 thou....................foood for though