I just got my rebuilt 13b running and I'm premixing. I put in 1.5oz of premix oil per gallon. Just want 2 make sure that's good. My exhaust sleeves are black and have a tacky substance coating them and the apex seals and inside of the engine feel lubed.

 

are you still running the omp or is it blocked?

Rotary > Pistons

 

Everyone has different numbers, but I think the generally accepted standard is 1oz per gallon.

 

I deleted my omp and I run 1oz per gallon. No smoking and my internals were lubed nicely when I pulled apart my engine. I'm a firm believer in premix.

 

1oz per gallon is more than enough for most...

 

that tacky substance is extra premix, either use a little less or drive harder

 

its deleted omp. thanks just making sure. I will probably run this tank out and start running 1oz per gallon.

 

You can do that or dilute the mix with just straight gas if you know how much is left.

 

I run 10-12 oz per tank of fuel. Any more than that is probably too much for normal driving.

 

well I just ran out of gas so I will probably do 1.10oz per gallon when I get her broke in and tuned. I intend to drive the **** out of this engine.

 

slightly more is better than slightly less, the only drawback is going to be possibly fouling the plugs.

i have recommended 1.5oz per gallon before on rebuilds during break in but generally i recommend 1oz per gallon for regular driving and 1.5 for the track.

 

well I haven't fouled any plugs yet. and this is my drift car so that why Im leaning towards a richer mixture.

 

I don't have my omp blocked off. I use .5 oz per gallon of gas.

 

Do many people do this?

 

Yes we do.

Regardless of whatever internal wear may already exist, and with the factory MOP installed , it is never a bad idea to run with premix.

I've never had a fouling issue, but I'm also bat **** crazy and replace my plugs as part of regular maintenance.

 

Yes. There are three camps basically.

1. Those that don't want the annoyance of pre-mixing and run OMP.

2. Those that don't want to commit to pre-mixing and buy the 4oz bottles and run 4oz per tank plus OMP.

3. Those that commit to pre-mixing and run around .5 - 1oz/gal.

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It is generally accepted that pre-mixing is better then OMP though you will find some outliers that don't agree.

 

This is good, I ran it the same wy in my TII.

 

I run 100:1 on dd(1oz of oil to 1gal). Track I use 200:1(2oz per 1gal)

I prefer maxima 2stroke oil. Its a smokeless forula and also leaves less carbon.

 

just so people don't read this incorrectly. there is 128 fluid ounces in a gallon, so 1 ounce per gallon is 128:1.

2 ounces per gallon is 64:1.

2 stroke engines for example generally run 24:1 to 40:1, smaller less labored engines 50:1. the spark plugs on the 24:1 engines usually last about 10 hours if you're lucky before beginning to foul, infinitely longer on the 50:1 engines.

 

Thanks for correcting that. I didn't know the exact gallon.to oz measurements.

 

Im using idimitsu rotary premix oil. and I know I probably spelled it wrong.

 

I just started premixing. My FC still has the OMP on it and I am running 200:1 ratio. No smoking and it may be my mind playing tricks on me, but the engine runs noticeably smoother.

 

I also still have both OMP in my 90 91 & premix lightly .5 per gallon. I didn't feel like buying block off plates & hanging the OMP off my strut tower.

 

This is the correct answer.

 

little bit of trivial information- but I have been running an ounce per 5 gallons of good 2 stroke in my superduty every other tank or so and it definitely runs smoother