Ideal ratio for 2-cycle oil in 4-stroke gas?

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Could 2-cycle oil in my gas for 4-cycle engine be good or more economical to help preserve the function of a fuel pump. All I want to do is help the pump live as long as possible. If it can reduce piston/upper cyl friction, great. Lucas UCL at $.10c a gallon is too expensive. It's used at 3oz/10G ratio....that's 200:1, right? Is that a good ratio for fuel pump maintenance? Should I use something heavier, like ATF? I doubt if that burns clean. How economical is 2-stroke oil at 200:1?
 
Don't use ATF, it will not burn clean. I used it on an old weedwhacker, it made it run GREAT for about 8 hours. Then it started stumbling and having trouble starting. It never recovered and eventually failed and was scrapped.

It was really carboned up on the inside after using atf. It wasnt like that before.
 
IMHO nothing will provide sufficient lubricity to keep a fuel pump going, assuming that your fuel pump is suffering from pressure loss due to worn vane or bushings. Eventually, it will have to be replaced to restore proper fuel pressure and reliability.

If you insist, try MMO or FP. No guarantees as to how things gonna work for I always go after the root of the matter (in this case, a fuel pump replacement in order)....

Also: 2cyl oil isn't meant to be used in-conjunction with typical automotive 4-cycle engine, for there are ZDDP additives within that will damage/poison your cat and O2 sensors...
 
I don't think there is anything in a fuel pump that could have it's lubrication replenshed with a fuel additive. it has already been designed to run with no lubrication where it comes in contact with fuel.
 
The only reason to run 2-stroke oil in a 4 stroke would be on a rotary engine(acts kind of like a 2 stroke) to lube the apex seals,and to protect them incase the metering oil pump quits
 
200:1 is pretty good.

Here's one good reason to use a tiny amount of ashless 2-stroke oil in gasoline: There are no lubricity agents in modern gasoline.

I don't use many gas adds, but I do notice when I use 2-stroke additized fuel - my cars run better, better MPG and better seat of the pants dyno power. When I go back to normal gas, car returns to normal....I've done this enough to know it's not just my mind on crack. My spousal unit has noticed it as well and I did NOT even tell her about the fuel. Maybe it depends on the car, so YMMV.
 
ccs v2.0 is correct on the math, 3 oz. in 10 gals is a 426 to 1 mix.

I normally mix my 2 stroke oil at 3 oz. in 1 gallon for a 42/43 to 1 mix for outdoor power equipment.

200 to 1 would be .64 oz to 1 gallon or 6.4 oz for 10 gallons.

250 to 1 would be 2 of the little 2.56 oz, 50:1 mix bottles, or 5.12 oz in 10 gals of gas.

As Pablo indicated, use a TCW-3 marine 2 cycle mix oil to avoid getting sparkplug deposits from the detergent additives in an air-cooled JASO FC/ISO-LEGD mix oil.
 
I have noticed better running engines when I put the unused 2 stroke mix in cars every spring [leftover from snowblowers].
At first, I thought it was just me, but there is a consistent pattern. My cars like it.
I may intentionally use the 2 stroke oil as an additive, now.
 
Quote:


pablo, do you use an amsoil ashless or some ceapo stuff???

JMH




I'll use either of the Amsoil 100:1's, but Saber Outboard is preferred. Really though 200:1 or 400:1 with a high quality 2-stroke oil, there's not a huge concern about deposits.
 
Poulan 2-cycle "Synthetic" is $4.50/21oz. Seven 3oz treaments of 10g each. So, $4.50/7 is $.64c to treat 10g, or $.06c/G. That's not too bad considering it's +$.10c/G for Plus 89 RON gas. The car does seem to like it. Maybe the pump is happier, maybe not. Lucas UCL mentions fuel pump lubrication. I know a film of oil in/on the fuel system helps prevent corrosion.
 
If you want to track the gradual failure of a vane type fuel pump and it required a 15 amp fuse you start using an 8 amp fuse. When it fails go to 10 and then the same to 12 and so on. when you get close to 15 amps replace the pump. It's a good way to follow the wear pattern of your pump. This may be a way to adjust the dose of 2-cycle oil, MMO or FP or what ever you want to try.
 
I use the Lucas UCL at 1:850 to 1:1000 in my 4 strokes. It successfully quiets the fuel injectors and fuel pump, and gives the engines a smooth feel. It has alot more "crawl" to it than the outboard oils, which seems to keep everything in the fuel system wet and lubed. Carbs and intakes stay clean just like they do on my outboards.

I have tried 2 stroke outboard oil, but it seems to take a richer mixture than the Lucas UCL to get the same sound and feel. I have tried full synthetic 2 stroke oil and the Pennzoil blend, but prefer the Lucas UCL. I always have alot of outboard oil around to feed my three outboards. One drinks a half gallon of oil an hour at full song!
 
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