old gas
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Senior User
Joined: Jun 2010
Posts: 409
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From: Visalia,CA
old gas
so my truck (69 f100) was sitting for about a year before i bought it, so i think the gas it bad, ive been looking up on who to get it out and someone said that i could mix new gas with old gas? or should i try and siphon it out? is there any auto store that sells siphon kits?
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
ls, Others might disagree, but I would add as much new gas in with the old as I could get in, & fire it up without hesitation. It's not gonna take long to drive it out.
If it was 3-5 years old I would think differently.
John
If it was 3-5 years old I would think differently.
John
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Senior User
Joined: Jun 2010
Posts: 409
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From: Visalia,CA
the main tank is about half full and the spare tank it emtpy i think
Senior User
Joined: May 2005
Posts: 218
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From: sw colorado
I've found you can pull the fuel line off at the pump and put it in a can, then blow into the tank to get it "primed". Make sure your hose from the pump is as low as you can get it, and it will usually drain out (siphon). Only a year old shouldn't be to bad yet, but I'd still try to get most of it out if you can. If not fill it clear to the top and try it, once it's down to half fill it up again.
New User
Joined: Oct 2009
Posts: 24
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From: Central Coast Cali
I just started my 69-F250, it had been sitting for seven years. The gas tank was almost empty so I just added Five gallons of fresh gas with some Sea Foam additive. Checked the points and the plugs all looked good., primed it and started right up. I did add a new inline fuel filter to catch any junk from the tank.
FTE Chapter Leader
Joined: May 2001
Posts: 3,322
Likes: 20
From: Rhode Island
I usually mix in as much new fuel as possible...Sometimes I might even buy a couple gallons of premium to bring the octane up.
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Senior User
Joined: Jun 2010
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From: Visalia,CA
i just might try that, ive started it and it runs fine, i just didnt know if it would ruin my engine or anything.
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Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
The year old gas, is a little stale but is not bad gas. I bet you can drive the truck as is with no harm at all.
There have been times when I wasn't driving my truck much and the gas would be a year old. It would have been cranked and driven some but not enough to use up the gas.
John
There have been times when I wasn't driving my truck much and the gas would be a year old. It would have been cranked and driven some but not enough to use up the gas.
John
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
I would say the opposite...the closer to full it is, the more likely that it's still good as a larger volume of gas deteriorates more slowly. I wouldn't worry about using gas that's only a year old in one of these old trucks, even with the crap they sell us that poses for gas out here in Ca.
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lameousername
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Sep 6, 2015 04:17 PM
