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Posted by: luvatenor Dec 30 2018, 09:12 AM

I have a 74' 2L with Weber carbs. Does anyone use a gas system additive. I have read many articles about individual gas additive manufacturers, but I can't seem to get an opinion about adding or not adding one to my gas tank. I thought they might be helpful to cleaning the carb jets, ect. but I don't know if they are recommended- Thanks -Rolf

Posted by: michael7810 Dec 30 2018, 09:54 AM

I have a similar setup and use Stabil to fight the effects of ethanol has on rubber carb parts. Plus I have a good filter before the pump and at the inlet to each carb. And if you don't know about these https://www.cbperformance.com/product-p/7557.htm check them out as they will save you annual idle jet maintenance.

Posted by: 73-914 Dec 30 2018, 11:26 AM

Marine Stabil works very well with Stewart's Premium no ethanol

Posted by: pvollma Dec 30 2018, 10:46 PM

QUOTE(luvatenor @ Dec 30 2018, 11:12 AM)

I have a 74' 2L with Weber carbs. Does anyone use a gas system additive. I have read many articles about individual gas additive manufacturers, but I can't seem to get an opinion about adding or not adding one to my gas tank. I thought they might be helpful to cleaning the carb jets, ect. but I don't know if they are recommended- Thanks -Rolf

I've used Bell Performance Ethanol Defense on all my pre-ethanol cars:

https://www.bellperformance.com/fuel-treatment/ethanol-defense

You need only 1 oz for 10 gallons of gas. I buy it by the gallon and transfer it to one of their 32 oz bottles with the dosing cap that I keep in the frunk.

Posted by: Mark Henry Dec 31 2018, 07:47 AM

IMHO most additives are snake oil.

Not counting some FI cleaners and storage additives like sta-bil.

Posted by: jdamiano Dec 31 2018, 07:51 AM

I’m sitting in a coffee shop waiting for 2 other local 914 owners. We are going twisty road hunting this morning. First stop, ethanol free gas pump. Usually find them near boat ramps.

Posted by: IronHillRestorations Dec 31 2018, 07:59 AM

BG fuel additives are a good product for cleaning the combustion chamber, but I don't know about dealing with the ethanol issue

Posted by: Lucky9146 Dec 31 2018, 12:10 PM

I have a friend who has used Marvel Mystery Oil as a gas additive for 30 years and swears by it, on his non cat cars of course.

Posted by: JmuRiz Dec 31 2018, 01:08 PM

Like other's mentioned:
I use Stabil Marine stabilizer and try to run a bottle of Techron every few takes to keep things flowing.

Posted by: GeorgeRud Jan 1 2019, 02:23 PM

Probably the best option is to try to keep driving the car as today’s fuels are designed to be burned quickly and not stored. Since that’s not likely in the Midwest, I try to find ethanol- free fuel and use Marine Sta-Bil over the winter.

Posted by: thelogo Jan 1 2019, 02:50 PM

QUOTE(Lucky9146 @ Dec 31 2018, 10:10 AM)