Y not Synthetic GL-5 in gearboxes?

[bob h]

They have decreased the zinc in automotive oils to avoid fouling cat converters. The problem is that older flat lifters need the zinc to avoid camshaft lobe wear. Most late model vehicles have roller lifters which don't need the zinc content. I have some info on actual zinc content of auto + diesel oils that I can probably dig up if anyone is interested.
It becomes of great concern in racing with higher cam lifts and spring pressures.
Bill

i have heard this... never seen it on paper, so yes i'd love to see it

i don't remember a time when H/D diesels used flat tappets

[Blind Driver]

They have decreased the zinc in automotive oils to avoid fouling cat converters. The problem is that older flat lifters need the zinc to avoid camshaft lobe wear. Most late model vehicles have roller lifters which don't need the zinc content. I have some info on actual zinc content of auto + diesel oils that I can probably dig up if anyone is interested.
It becomes of great concern in racing with higher cam lifts and spring pressures.
Bill

i have heard this... never seen it on paper, so yes i'd love to see it

i don't remember a time when H/D diesels used flat tappets

He was discussing auto oils

[bob h]

They have decreased the zinc in automotive oils to avoid fouling cat converters. The problem is that older flat lifters need the zinc to avoid camshaft lobe wear. Most late model vehicles have roller lifters which don't need the zinc content. I have some info on actual zinc content of auto + diesel oils that I can probably dig up if anyone is interested.
It becomes of great concern in racing with higher cam lifts and spring pressures.
Bill

i have heard this... never seen it on paper, so yes i'd love to see it

i don't remember a time when H/D diesels used flat tappets

He was discussing auto oils

that is correct

[bob h]

They have decreased the zinc in automotive oils to avoid fouling cat converters. The problem is that older flat lifters need the zinc to avoid camshaft lobe wear. Most late model vehicles have roller lifters which don't need the zinc content. I have some info on actual zinc content of auto + diesel oils that I can probably dig up if anyone is interested.
It becomes of great concern in racing with higher cam lifts and spring pressures.
Bill

still waiting =)


here's some good reading for the meantime...

http://www.svmgcc.org/tech_tips/oil_is_killing.htm

[xzostd1]

Sorry guys! I have been on the road...........Bob H, your link contains info. similar as to which I had read. I have not located the article I had read. It was in one of my drag racing publications.
They did talk about the possibility of using diesel oils in gas race engine.
Bill of "Bills Flatbed Shoveling Service"