What ratio do you use when adding oil to vehicle fuel?

[ZZman]

I am thinking ounces per gallon of fuel.

 

[demarpaint]

Originally Posted By: ZZman
I am thinking ounces per gallon of fuel.

What kind of oil are you talking about, and for what purpose? A UCL?

 

[old1]

When I want oil in my fuel, I use MMO, and follow the instructions on the bottle which is 4 oz per 10 gal. Some people use tcw3 and mix it at 2 oz per 10 gal.

 

[wag123]

Using tcw3 2-cycle engine oil, mix at 1 oz of oil per 5 gal of gas.

 

[Kira]

Wouldn't a fuel : added oil ratio be spelled out in the owners manual?

 

[gathermewool]

I use precisely 0.0 ounces of oil for each gallon of fuel. It’s easy to remember and even easier to apply.

 

[4WD]

Originally Posted By: gathermewool
I use precisely 0.0 ounces of oil for each gallon of fuel. It’s easy to remember and even easier to apply.


I like to be more accurate and international … so 0.00 ml is what I use …

That’s not to say a bottle of Gumout or Techron will not go in the last tank before oil change …

 

[Ducked]

My 2-stroke motorcycle has a mixing pump which varies the mix depending on RPM ( 133cc Yamaha RZR). Likewise the local 50cc 2-stroke scooters.

Premix I've run 1:25 which is high and smoky but better than a seized engine, which can kill you.

As UCL the ratios are much lower, maybe 1:250 or so, but I've never done that.

Haven't used fluid ounces since the '50's.

 

[Olas]

1oz total additive in a 10 gallon tank, if at all.

 

[FCD]

In Germany it's popular for Classic car owners to ad 1% 2 stroke oil to their gas.
They say it protects the carburetors and rubber fuel lines from the ethanol.

 

[maxdustington]

640:1

 

[4WD]

Well, the outboard mechanics find that some hose can not hold up to the corn juice.
There is a large Yamaha dealer here that swaps factory hose out to Evinrude hose …
(assume they don’t have the same supplier) …

 

[Cujet]

We have an old forklift with a flathead 4 cylinder engine. It's valves tend to stick open and it then runs miserably on 2 or 3 cylinders.

We've tried MMO, upper cylinder lube from WalMart and other cleaner without results. What works is synthetic 2 stroke oil, such as Castrol TT-S. We mix it at 32 to 1 and the valve sticking problem goes away during that tank of fuel and stays away for many more tanks without the additive (maybe a year)

Clearly, a synthetic 2 stroke oil is not bothered by the exhaust valve heat and lubricates them enough to function.

 

[Warstud]

Originally Posted By: gathermewool
I use precisely 0.0 ounces of oil for each gallon of fuel. It’s easy to remember and even easier to apply.

^^^^^ This sounds like another one of his useless questions and has no intention of doing it himself.

 

[Whipcitywrencher]

I've tried the tcw3 one ounce to five gallons gas.
A couple of tank fulls.
Can't say I've seen any difference in performance either way.

 

[spasm3]

I don't add any to my cars/truck. I do use 1 oz of tcw3( in 5 gallons) in the ope fuel with sta-bil. I only use this mix in the last tank of fuel before winter storage.

 

[Snagglefoot]

Up in Canada, two cycle oil is in liters and gas is in liters. My boat uses 50:1. Fifty liters of gas and 1 liter of oil. For small equipment I use a syringe marked in CC. One liter of gas and 20 CC of oil for 50 to one. I guess some of use are taking about two cycles and some are talking about two cycle oil in the gas of four cycle engines which is asinine in my opinion. .

 

[wag123]

Here is the forum thread where the idea of adding tcw3 two cycle oil to the gas in motor vehicles was first floated over 10 years ago...
https://www.ls1.com/forums/f48/been-testing-oil-91206/
IMO this has some merit. BTW, the cheapest Supertech 2-cycle tcw3 outboard motor oil works well for this.

 

[dblshock]

I've been running 1oz TC-w3 to 5 gallons in all my t4's for 10+ years.

 

[Yah-Tah-Hey]

WHY?