2-cycle oil as a fuel add in 4-cycle engine

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I've noticed that my car has been running very well and idling much better than usual on this tank of fuel, especially in the last 1/4 of the tank. When I had about 12 gallons (20 gallon tank) of gas left in it, I poured about 3 oz of SuperTech ashless 2 cycle oil into the tank, followed by 3/4 gallon of 91% isopropyl alcohol. I'm not really sure which is causing it, or if it's a combination of the 2, but I like it! I'm really hoping it's the oil rather than the alcohol, because the alcohol is $9 per gallon!

There's also a bit of MMO in the tank, but that hasn't seemed to have near this effect on its own. Perhaps it's actually all 3 things combining?
 
Just picked up a gallon of SuperTech TC-W3 2-cycle oil at Wal-Mart. It is still priced at $8.78.
 
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How does it compare to FP60? I'm on the last few ounces and don't have the cash now to order more. I was thinking of getting UCL but at $30 a gallon around here I would better off to pay a little more for the FP. This sounds like a good thing to experiment with though at $10 a gallon. I guess if it makes my car run funny the worst I could do is give it to relatives to run in their lawn mower.

What are its cleaning powers? I usually buy the cheapest gas I can find and it's usually not Shell, Chevron, BP, or Mobil so I like the idea of adding cleaners and a lubricant. And what adverse side effects are there if the car doesn't like it?
 
I'd say try it. I doubt you'll see any adverse effects. All 2 cycle has some basic cleaners and detergents so it should be helping.

A lot of this is speculation. I've noticed no improvements but I'm still running it. It makes me feel better. I feel like I'm lubing my fuel pump, injectors, and am cleaning in the mean time.
 
I had 1/2 a qt of MMO and 1/2 qt of Pennzoil 2 Cycle Marine Oil I mixed up and have been using at a rate of 4 oz/10 gals of gas. So far so good, my 93 Aerostar seems to idle a little smoother.

Frank D
 
Update on my 07 F150 with 4.6 V8. So far no issues with the 2 cycle oil. About .5 mpg better according to logging files from my Edge programmer. It definitely seemed like the second tank of mix gas was when everything started to line out for the better. Knock sensor ticks and spark advance seemed to stabilize over the same route. This is probably when you finally hit the consistent mix. I didn't double dose like others on the first batch. FWIW I'm mixing 4 oz of interceptor with 20 gallons of 85 octane E10 at each fill up.
 
My car seems to like low doses better also. I tried 6 oz in 10 gallons, wasn't great. Now I'm trying 2 oz in 10 gallons. Hopefully will be better.
 
Originally Posted By: sciphi
My car seems to like low doses better also. I tried 6 oz in 10 gallons, wasn't great. Now I'm trying 2 oz in 10 gallons. Hopefully will be better.


I found that an overdose will result in loss of power and loss of economy. I have an Inverse Oiler set up for close to 20 years on a Ford van. If I increase the amount of oil fed from the Inverse Oiler to the engine I actually need to give more gas on a 5 speed stick to take off from a stop.

The oil (MMO) is metered to the engine from a drop in vacuum. Under load, the vacuum drops, the oil flow from the oiler increases. Revving the engine does not increase the amount of oil flow from the oiler. Anyway too many drips of oil fed from the oiler cuts power and fuel economy. Getting the proper amount takes time, but its worth the effort.

If you are adding MMO or 2 cycle oil to gas the sweet spot seems to be about 4 oz/10 gal of gas.

Frank D
 
Yes, I saw a big jump in the price at Auto Zone when I was there over the weekend.

Frank D
 
For 2 cycle oil which has no long term effect that's an indication that you can get the same benefit with less. While the stuff may be cheap, it would be even cheaper if it lasted 3 times as long.

Say your current concentration is 3 ounces per 10 gallons and you run the tank down to 3.33 gallons which leaves 1 oz of concentrate. Now you fill up to 15 gallons and you are at 0.75 optg. Instructions for many products say 1-3 optg so you are still close to the normal range.

The first fill doesn't dilute as far as you would think. Even if you run your tank dry it isn't really dry since there is some amount of gas that is not recoverable. Overdosing ensures that you can go at least one fill up without a performance drop in case your additives aren't handy.

For something like a CC cleaner that has a long term effect measuring effectiveness by dilution doesn't work so well.
 
Even when using the MMO/LUCL mix, I have noticed that a couple of ounces in dosage can make a noticeable difference. In my 12 gallon tank, 6 ounces of the mix added is a bit too much. Causes the car to be sluggish. 4 to 5 ounces seems to be what the SX4 likes. Not adding the mix for every fill-up helps also.
 
yeap same results in Mazda Rx-7 rotary engine, and those are design to burn oil. If I went over 14 oz per 16 gallons, power lacked a little. did not get a chance to try it on the accord.
 
I don't think 2-cycle oil or castor oil or whatever has any advantages over the FFP60 or FP+, since LCD's products already have various compounds in them to lubricate fuel pumps, clean the fuel system, and act as UCL's.
 
The other day I put in one ounce of ST TCW-3 in 4 gallons of gas in my lawn tractor. What I noticed is that it no longer backfires or detonates after I shut it off.

Interestingly my manual for the B&S engine on my Swisher mower has a warning not to add 2-cycle oil to the gasoline since this will shorten the engine life. Anyone have any thoughts about this?
 
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Originally Posted By: kd5byb
My next tank of gas will be just that - gas. No additive. If the dead spot goes away, I know that old 2-cycle oil was a bad idea.


Update - dead spot gone. Something wasn't right with that 5 year old non-TCW3...
 
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Originally Posted By: MolaKule
I don't think 2-cycle oil or castor oil or whatever has any advantages over the FFP60 or FP+, since LCD's products already have various compounds in them to lubricate fuel pumps, clean the fuel system, and act as UCL's.


If there's a part of the thread in an earlier page I missed, my apologies.

Wouldn't an advantage of 2-cycle oil be price and availability? It's cheap and available pretty much everywhere.
 
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