I have a 1959 327/350hp 4 speed and not sure correct additives needed with unleaded gas. Can anyone advise correctly as it seems everyone has their own ideas

Asked by May 16, 2014 at 12:26 PM about the 1959 Chevrolet Corvette Convertible Roadster

Question type: Maintenance & Repair

I am trying to find out specifically what is the correct additives for a 1959 corvette
327/350hp so when I fill up with unleaded I have no issues.

2 Answers

100,525

The classic cars guy out here all use sta-bil marine, the add in a lead substitute if their engines haven't been modified for unleaded fuel. If it is a 350 horse engine then you really need high test fuel, you still might have to add some octane booster to keep it from pinging.

1,205

Since it is not the original engine, it might have hardened valve seats and not need any lead substitutes. It also might have reasonably low compression and not need high octane fuel. I run regular unleaded fuel in my Vette with no trouble at all.

1 of 1 people found this helpful.

Your Answer

Chevrolet Corvette Experts

  • #1
    John Carson
    Reputation
    2,410
  • #2
    Vincent Parker
    Reputation
    1,610
  • #3
    carGrrl
    Reputation
    1,460
View All

Used Cars For Sale

2017 Chevrolet Corvette For Sale
18 Great Deals out of 7,317 listings starting at $44,900
2016 Chevrolet Corvette For Sale
31 Great Deals out of 1,223 listings starting at $41,000
2015 Chevrolet Corvette For Sale
14 Great Deals out of 731 listings starting at $39,900
2014 Chevrolet Corvette For Sale
23 Great Deals out of 815 listings starting at $35,000
2013 Chevrolet Corvette For Sale
13 Great Deals out of 355 listings starting at $24,790

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.