joseysvette

I have a 1967 corvette 327/350 and have been told I need to run lead additive all the time. can you give me some input on this. Have heard some people say every other time I fill up and then some say it should be added every fill up...it was meant to use leaded gasoline.
thanks, Josey

capevettes

Josey, you don't need it. Many of us have run these cars in stock form for many years with no valve recession issues whatsoever. Unless you're towing or racing it is not needed.

68hemi

You don't need it at all nor do you need hardened valve seats. The best thing you can do for your car is to run non ethanol gas.

MikeM

89 octane, E 10 keeps my fuel system very clean. All my old cars have been running for years on it with no problems. I don't have any hardened valve seats, don't use any additives and don't see a reason to have/use them.

All have similar factory rated compression as your engine. Don't know what mine are, don't care and don't know what yours really is.

leif.anderson93

First off, welcome to the Forum. Secondly, welcome to the wonderful world of C2 ownership...especially one with the L79 engine. As others have noted, no need for any additives of any type. I, personally, feel better running 93 octane but I'm probably wasting money. You can run the lowest octane your car will tolerate (without knocking or pinging). Most importantly, drive her as often as you possibly can. That's the most important thing you can do for your car...and yourself!!

William Buckley

Only thing that I do is add ZDDP to the oil at oil changes, and there is a lot of controversy involving using that.

Frankie the Fink

There's no controversy that ZDDP is needed for our cars; you can add it or buy oil with sufficient amounts already in it.
Lead additive is unnecessary.

What is it with the "I've been told...." and "two old school mechanics said to me...." and " a friend advised me to...." and "some guy at a car show told me...." lately ?

So many experts -- so much wrong info...

SDVette

I'll throw myself on the fire and be the contrarian.

I run lead additive. I use "Octane Supreme", which is the only product, as far as I know, that actually contains lead. The plastic bottle stuff carried in auto-parts stores do not.
There are many stories of "no problems".. I get that. But for some reason on this forum, the powers-that-be approve of ZDDP, and disapprove of lead additive..Even though both recreate the original conditions that our motors were designed for. I don't quite understand the logic.

Anyway... do your own research.. There are plenty of stories of documented destroyed valve seats out there due to unleaded fuel.. with tear-down photos..

And welcome to the forum.. You just happend to choose a highly debated issue as your first post!

MikeM

juanvaldez

Run avgas 100 LL.

Frankie the Fink

Damage in cars used under what conditions ?

I've been driving classics since lead in gas was abolished, never used any additive and never had a problem....Mustangs, Camaros, Chevelles, Corvettes, Pontiacs -- you-name-it...

Again I offer my feel good service at a nominal cost - send me the money you'd spend on an additive and I'll send you a weekly email telling you all is well.

Still working on the draft - whadda ya think ?

"Good Day Mr. ________!

Another week has passed and even though you didn't purchase and use the XXXXX additive, all is still right with the world. The sun came up this morning, the birds are singing and your engine didn't grenade itself from the lack of XXXXX additive. You can look forward to another week of pleasurable driving without any additional fluids added to your gasoline or engine oil.

Please remit $5.95 to OICU812@earthlink.net via Paypal and look for a similar inspiring email next week!"

wmf62

AWESOME..... (although I sometimes sneak some MMO...)

Bill

SDVette

My aunt Millie smoked 2 packs a day and drink a 1/5th of Vodka.. and she lived to be 88...
I don't want to re-litigate this here.. just wanted to post an opposing opinion.

And some stories:

https://www.fiatforum.com/500-classi...-unleaded.html
http://www.flowspeed.com/seat-recession.htm
https://www.pistonheads.com/gassing/topic.asp?h=0&f=66&t=1073072



Why doesn't the "Frankie The Fink Feel Good Policy" cover use of non ZDDP oils?

Frankie the Fink

Vendor oils that already have the proper amounts of ZDDP are not "owner additives"....and ZDDP is indeed a legitimate requirement for flat tappet engines.
Anybody that buys ZDDP separately is paying orders of magnitude over getting oil that already includes it.

However, for an additional $3.95 weekly I'll send a custom email to cover this as well...

MikeM

I once knew a woman that ran a motel in a small town. She had a radio that didn't work and she assured me, she got it working by pulling out one of the tubes and putting and a tube of pipstick in it's place. Tru Story!

Frankie the Fink

I don't know what pipstick is.....

DansYellow66

I use a little Octane Supreme in my BB but not for the lead content (which it actually has and it's expensive) - but for a bit of an actual octane bump to ensure against detonation. I have a case of it and it's easier for me to fill the tank with 93 down at the corner and put a bit of Octane Supreme in rather than drive way out to the airport for aviation fuel. I don't really like adding any lead (I have aluminum heads so no need) but I don't want to mess with Toluene either which is the other option for a real octane boost.

phil2302

And then there are the cases of hardened valve seats installed improperly coming loose and wrecking the cylinder head.
I will save my $ and continue using 87 unleaded like I have for 25+ years

MikeM

There are probably many things I could help you with that you don't know about.

wmf62

it's lipstick for fat fingered typists (but you already knew that...)

Bill