Gas pumper
Team Owner
Joined: Sep 2001
Posts: 62,154
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
I'd say it depends how old that gas is to be sure, but if you think its too old then get it out of there.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
How much of the old gas is left in the tank? Not too bad of a job to get the old gas out. You can remove the fuel pump assembly to siphon the old gas out, then replace the "sock" on the pickup tube. Put the pump back in and replace the fuel filter. .Fill the tank with premium grade and add a bottle of Techron. Then run that tank until its empty. Fill up and add another bottle of Techron.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Drifting
Joined: Nov 2018
Posts: 1,798
Likes: 579
From: Mays Landing, NJ
When I purchased my 91 last October it had half a tank of gas, but when run it started and ran fine. Seller did tell me the gas in there was pretty old, but since it still ran decent all I did was fill it with premium and that worked fine. If it ran like crap when I went to see it I would have been more concerned because no telling if it was just old gas or an actual engine issue. As Tom400CFI says, it is difficult without having more info.
Last edited by CorvetteRules; Mar 25, 2019 at 03:18 PM.
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Le Mans Master
Joined: Aug 2017
Posts: 6,941
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From: New Jersey
I've run what could only be described as varnish through motors... disconnect the fuel filter and jump the relay and drain it that way into a can of you want to make it easier. If you can throw 10 gallons on top of it that's what I'd do.
Team Owner
Joined: Jul 2004
Posts: 28,465
Likes: 3,288
From: Hartford WI
Team Owner
Joined: Jul 2004
Posts: 28,465
Likes: 3,288
From: Hartford WI