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Chainsaws and Subies - brothers under the skin?
Posted 12 August 2005 - 11:16 AM
I'm nervous about putting anything suspect into the tank of my '90 Legacy, but to my surprise the local Subaru dealer said this should be no problem, if it was only half a gallon of old fuel/oil mix and I took care to dilute it into a full tank of fresh gas. In a worst case scenario I might get a 'check engine' light and the codes would have to be reset, but no harm would be done.
Does this sound like good advice? Is there any chance I could create problems down the road by doing this? I've never had any engine problems with this car and I've always been meticulous about maintenance...
'90 Legacy wagon, AWD, auto, 164,000 miles
Posted 12 August 2005 - 12:44 PM
Posted 12 August 2005 - 03:01 PM
Posted 12 August 2005 - 03:09 PM
Posted 12 August 2005 - 09:14 PM
FWIW, I was told that adding a stabilizer was a 'second-best' solution when using fuel for high rev 2-stroke engines. And when I checked with the company that makes 'Opti 2' 2-stroke oil, which is widely recommended these days and advertises that it contains a fuel stabilizer, the tech guy said that even with their included stabilizer he would be reluctant to use the mixed fuel after 60 days...
Sounds pretty anal to me. I routinely keep mixed fuel over the winter with stabilizer added. I use this in my leaf blower, chainsaw, brush cutter, and weed whacker. Been doing it for many years and never had a problem. I'd much rather take a chance of hurting a $300 yard tool, than gumming up the fuel system on a $20,000 car. Priorities, don'cha know.
Posted 13 August 2005 - 04:30 AM
i too leave fuel for long periods of time... over winter without stabalizer... been using the same mower for probably 8 years... no problems... heck i don't even think the oil has been changed...
Posted 13 August 2005 - 08:18 AM
IME, most engines will run fine on year-old gas, although starting might be a little more difficult (especially 2-strokes). In a pinch, adding 20-30% fresh stock to any troublesome year-old stuff will generally render it operable. This is for gas that's been stored in a closed can, in a cool area. If the can's been left open, or it's been left sitting out in the sun ...well...?
Don't be tempted to seasonally store power equipment (e.g. snowblower) without first draining the fuel. Stabilizer helps prevent gumming and varnishing for intermediate strorage intervals, but shouldn't be thought of as substitute for seasonal draining. Especially if you've got a nice Robin Subaru generator.
Posted 13 August 2005 - 09:44 AM
I have tried both methods, running the tank dry, or keeping the gas in (this was with a kawi ninja). Running it dry seemed better then letting the gas sit in the tank for 2-3 months. Gas has a shelf life of about 90 days when stored in a vehical, due to some of the additives seperating and evaporating off. In a tank up to a year or longer is not unheard of. I have a generator in the back yard that I replace fuel on a 4 month cycle. The car doesnt seem to mind it, as i dont dump the entire tank in the car, the last bit i get rid of as it has gunk floating in it.
When old gas sits in the carb jets, its an issue. That gunk will clog jets and orafices.
SInce gas is a solvent, i would imagine that it would start to attack the 2 stroke oil and render both useless. Why not just mix as you need, and use STABIL in the gas.
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