Fuel opinion and additives

[1990 quasar blue]

Originally Posted by Corbusa

I just use Amsoil .
But heres a copy from another corvette forum about VR1
http://forums.corvetteforum.com/c3-t...ht-it-was.html

Thanks for the link. I should have said vr1 synthetic. Check out this link. I believe it's the same guy from the old Corvette forum link you gave me. The zddp numbers look sound.
http://speedtalk.com/forum/viewtopic.php?f=1&t=31224

[Hib Halverson]

No one needs to put ZDDP "additives" in the oil of an LT5 engine.

There is so much BS on the Internet about ZDDP it's ridiculous.

Low levels of ZDP in engine oils is only an issue with flat tappet camshafts working pushrod operated valves, ie: pre-'86 Small-Block V8s.

The LT5 is an overhead cam engine and thus has far lower loads at the lobe/lifter interface and does not require any additional ZDP either from an "additive" or a special oil.

In fact, on the subject of ZDP additives, be careful, very careful, because, contrary to popular belief, with ZDP, it is bad to assume that "if some is good, more is better". You can get to a point with ZDP concentration in the oil that more ZDP will damage the engine. If you insist on "brewing" your own ZDP fortified engine oil, don't let ZDP concentration beyond the point that you have above 1600 ppm phosphate content in the oil.

If you want to know more about ZDP and engine oils in general, see:
http://www.corvetteactioncenter.com/.../#.UIiwG46ICdU

[4CAM LT5]

Originally Posted by Hib Halverson

No one needs to put ZDDP "additives" in the oil of an LT5 engine.

There is so much BS on the Internet about ZDDP it's ridiculous.

Low levels of ZDP in engine oils is only an issue with flat tappet camshafts working pushrod operated valves, ie: pre-'86 Small-Block V8s.

The LT5 is an overhead cam engine and thus has far lower loads at the lobe/lifter interface and does not require any additional ZDP either from an "additive" or a special oil.

In fact, on the subject of ZDP additives, be careful, very careful, because, contrary to popular belief, with ZDP, it is bad to assume that "if some is good, more is better". You can get to a point with ZDP concentration in the oil that more ZDP will damage the engine. If you insist on "brewing" your own ZDP fortified engine oil, don't let ZDP concentration beyond the point that you have above 1600 ppm phosphate content in the oil.

If you want to know more about ZDP and engine oils in general, see:
http://www.corvetteactioncenter.com/.../#.UIiwG46ICdU

Appreciate all the "de-bunking", HH....!!

[WARP TEN]

Originally Posted by Hib Halverson

If you want to know more about ZDP and engine oils in general, see:
http://www.corvetteactioncenter.com/.../#.UIiwG46ICdU

Hib, that was a very well researched and comprehensive article. As a former journalist I always have appreciated your excellent technical writing. There won't be any extra ZDP gong into my engine!-- Bob

[WARP TEN]

Originally Posted by WARP TEN

Hib, that was a very well researched and comprehensive article. As a former journalist I always have appreciated your excellent technical writing. There won't be any extra ZDP gong into my engine!-- Bob

Of course you would expect that as a former journalist I would be able to spell "going"..... :-)

[mike100]

I do have some Amsoil Z-Rod 10w-30, but I only mix in enough to duplicate zddp concentration in 1990's oil blends. Maybe 3 qts out of 8 to boost the modern formulation mobil1.

My goal is to not to overspend on the oil and to not get crazy with any additives that will coat down the catalysts and cause me grief during future emissions inspections.

[scottfab]

This time of year I use STA-BIL fuel stabilizer.
I get it to 1/4 tank and put in what's necessary.
No need to preserve more that 1/4 tank.

[Hib Halverson]

Originally Posted by WARP TEN

Of course you would expect that as a former journalist I would be able to spell "going"..... :-)

Dude...as a former journalist, you know none of us can spell.

[SteelBlueZR1]

Regarding recommendations on engine oils and ZDP contents, if you haven't read Marc Haibec's tech paper, you should check out:
http://www.zr1specialist.com/HAT%20W...5%20Engine.pdf

[WARP TEN]

Originally Posted by Hib Halverson

Dude...as a former journalist, you know none of us can spell.

I admit it does make me feel right at home