Hello all!
I just discovered this forum and this is my first post. Oil is a subject that is always debated, ask 100 different people and get 100 different opinions. I've got quite an education reading through Bob's oil university papers, but I'm still a little uncertain if I'm using the right oil, people here seem pretty knowledgeable so I'd like to ask your opinions. I have a 1968 Pontiac GTO With a 474 cubic inch engine bored, stroked and blueprinted, about 500 to 550 horsepower. It has a small hydraulic roller cam Aluminum pistons Edelbrock aluminum heads built by Butler performance Headers with 3 inch exhaust Edlebrock Pontiac performer intake manifold Edelbrock 800 CFM Thunder series carburetor and HEI ignition. It's a weekend toy no serious drag racing and I put about 2000 miles a year on it. I live in Illinois and it's in the garage from November to April but I do like to start it once and a while and take it for a short ride when the roads are dry. when I first got this car I was using the Valvoline 10 W 40 oil but was concerned with only 19 PSI at idle. I then switch to Castrol 20 W 50 oil But saw no reall improvement in pressure at idle when hot. I started using Brad Penn 20W50 And saw a big increase in pressure it now carries 30 psi at idle And 60 PSI at cruising speed About 2200 RPM's I thought I'd found the right oil for this engine But after reading some of the information on this site I am questioning that. Should I be using a synthetic maybe a 5W50? The motor rarely sees over 5000 RPM's and 5500 at the max. I'm interested in your opinions and appreciate your input Thanks
I just discovered this forum and this is my first post. Oil is a subject that is always debated, ask 100 different people and get 100 different opinions. I've got quite an education reading through Bob's oil university papers, but I'm still a little uncertain if I'm using the right oil, people here seem pretty knowledgeable so I'd like to ask your opinions. I have a 1968 Pontiac GTO With a 474 cubic inch engine bored, stroked and blueprinted, about 500 to 550 horsepower. It has a small hydraulic roller cam Aluminum pistons Edelbrock aluminum heads built by Butler performance Headers with 3 inch exhaust Edlebrock Pontiac performer intake manifold Edelbrock 800 CFM Thunder series carburetor and HEI ignition. It's a weekend toy no serious drag racing and I put about 2000 miles a year on it. I live in Illinois and it's in the garage from November to April but I do like to start it once and a while and take it for a short ride when the roads are dry. when I first got this car I was using the Valvoline 10 W 40 oil but was concerned with only 19 PSI at idle. I then switch to Castrol 20 W 50 oil But saw no reall improvement in pressure at idle when hot. I started using Brad Penn 20W50 And saw a big increase in pressure it now carries 30 psi at idle And 60 PSI at cruising speed About 2200 RPM's I thought I'd found the right oil for this engine But after reading some of the information on this site I am questioning that. Should I be using a synthetic maybe a 5W50? The motor rarely sees over 5000 RPM's and 5500 at the max. I'm interested in your opinions and appreciate your input Thanks