# What happens if one burns TWO-STROKE fuel in their vehicle? **URL:** \ **Category:** General Discussion\ **Created:** [October 12, 2012, 3:42am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941 "2012-10-12T03:42:58Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Robert-Gift](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/robert-gift/32/356_2.png) [@Robert-Gift](https://community.cartalk.com/u/Robert-Gift)\ **Post date:** [October 12, 2012, 3:42am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/1 "2012-10-12T03:42:58Z")
Friend does not want to waste 2-stroke lawn mower gasoline. Thank you. ---
**Author:** ![dagosa](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/dagosa/32/9837_2.png) [@dagosa](https://community.cartalk.com/u/dagosa)\ **Post date:** [October 12, 2012, 3:49am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/2 "2012-10-12T03:49:43Z")
The only problem that could possibly occur, is if it’s real old and the gas and ethanol created the problem. Otherwise, it’s a totally mute point. Two stroke oil is made to disperse evenly in gas. In a 50 to 1 mixture, added to say a half a tank of gas, it is diluted even more. Heck I would consider, and have, added two stroke oil to gas of a 4 stroke I was putting into storage. As long as it isn’t older then normal summer use, breath easy and dump it in. There is a lot of other advertised crapola that I would fear more. ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [October 12, 2012, 3:58am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/3 "2012-10-12T03:58:36Z")
pouring a gallon of 2 stroke fuel in the fuel tank of a car and then filling the tank with the correct fuel has never caused any problems for me and I have been doing that for many years. When I had an outboard it was not unusual to have several gallons of fuel left in the fall and adding it 1 gallon more or less at each fill up for weeks never caused a problem in the vehicles that I owned. Consider it upper cylinder lubricant that many people pay extra for. ---
**Author:** ![meaneyedcatz](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/meaneyedcatz/32/692_2.png) [@meaneyedcatz](https://community.cartalk.com/u/meaneyedcatz)\ **Post date:** [October 12, 2012, 5:56am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/4 "2012-10-12T05:56:14Z")
What happens if one burns TWO-STROKE fuel in their vehicle? The engine runs ---
**Author:** ![irlandes](https://avatars.discourse-cdn.com/v4/letter/i/b5e925/32.png) [@irlandes](https://community.cartalk.com/u/irlandes)\ **Post date:** [October 12, 2012, 6:09am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/5 "2012-10-12T06:09:44Z")
I must ask if you use too much of it per tank, will it not tend to clog the catalytic convertor? ---
**Author:** ![pleasedodgevan2](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@pleasedodgevan2](https://community.cartalk.com/u/pleasedodgevan2)\ **Post date:** [October 12, 2012, 7:28am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/6 "2012-10-12T07:28:05Z")
Most times you wouldn’t have enough of the stuff on hand to cause ANY problems. It gets kind of expensive if you buy premixed fuel so I might bet that even Consumer Reports wouldn’t experiment with it. ---
**Author:** ![oblivion](https://avatars.discourse-cdn.com/v4/letter/o/3ab097/32.png) [@oblivion](https://community.cartalk.com/u/oblivion)\ **Post date:** [October 12, 2012, 2:51pm UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/7 "2012-10-12T14:51:27Z")
If you add a little (a gallon or so) to a nearly full tank, it may even have some benefit in acting as an upper cylinder lube. If you add a lot to a nearly empty tank, I’d worry about putting strain on the catalytic converter and causing carbon buildup, and possibly contaminating the vehicle’s oxygen sensors. If it’s a nearly new vehicle, why risk it for a few bucks worth of gas? Put a little Sta-bil or other product in the gas and use it next year. I’ve been working my way down the same 5 gallon can of gas in my mower for over 2 years. (I originally bought some extra gas for a generator when it looked like we might have a bad ice storm here) ---
**Author:** ![dagosa](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/dagosa/32/9837_2.png) [@dagosa](https://community.cartalk.com/u/dagosa)\ **Post date:** [October 12, 2012, 4:31pm UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/8 "2012-10-12T16:31:40Z")
There are many cars, Toyota for one, that stipulate motor oil usage is normal. If burning a little regular lubricating oil doesn’t hurt the converter, two stroke motor oil certainly won’t. Besides, modern tw-3 two stoke oil is designed to be ashless and leave no residue after combustion. Like I said before, I would trust it more then Marvel and all that other crapola sold to drain money from your wallet. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [October 12, 2012, 6:23pm UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/9 "2012-10-12T18:23:01Z")
As others have said, cars burn a little oil anyway. The typical limit for ‘ok’ oil use (only according to the manufacturers) is 1 qt/1000 miles. If you get, say, 250 miles per tank, that’s a cup per tank. So that amount should be ok, assuming the car uses a lot less than 1 qt oil per 1000 miles. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [October 13, 2012, 5:46am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/10 "2012-10-13T05:46:50Z")
Call it “Top Oil” and enjoy the benefit… ---
**Author:** ![euryale1](https://avatars.discourse-cdn.com/v4/letter/e/41988e/32.png) [@euryale1](https://community.cartalk.com/u/euryale1)\ **Post date:** [October 13, 2012, 6:23am UTC](https://community.cartalk.com/t/what-happens-if-one-burns-two-stroke-fuel-in-their-vehicle/74941/11 "2012-10-13T06:23:27Z")
The amount of oil in the average two stroke gallon of gas into a half tank of gas in the car is not an issue for the engine or its cat or sensors.