2 Stroke with stock omp. Mineral or Synthetic?

[Freddy]

Best ratio is around 100 to 1 for really high power turbo engines that are driven really hard.For all other purposes think of around 125 to 1.
Use a good quality mineral oil,does not have to be for two stroke,even Castrol GTX 10/40 mineral engine oil is very good.I have used that alot in the past.
Hope this helps.:burnout
Regards
Carl

Sounds good Carl. Do you say 100 to 1 in addition with using the omp. Or when the omp is removed?

[Carl]

Sounds good Carl. Do you say 100 to 1 in addition with using the omp. Or when the omp is removed?

With the OMP you can run around 125 to 1 all the time,you certainly don\'t need more than that,think of it is a belt and braces job really.
It is not really necessary to run premix with an OMP too on mildly modded engines engines.
Regards
Carl

[mpk490p]

You won\'t get detonation probs from using premix.
The octane does not get reduced by adding the amounts of oil to the fuel that we are talking about whether the engine still has the OMP or not.
Think for a moment about it,if your fuel has a ratio of 100 parts fuel,to 1 part of oil,and your fuel has an Octane rating of say 99 points,then the fuel would only be reduced by less than 1 point,and in reality,fuel can vary up to 3 points,depending on time of year,and the age of the fuel,just sitting in your tank for a week you can lose a point.
Best ratio is around 100 to 1 for really high power turbo engines that are driven really hard.For all other purposes think of around 125 to 1.
Use a good quality mineral oil,does not have to be for two stroke,even Castrol GTX 10/40 mineral engine oil is very good.I have used that alot in the past.
Hope this helps.:burnout
Regards
Carl

Carl can i use the Valvoline Turbo V 10w30 mineral oil as a pre mix then? i guess it makes sense as this is what gets put back in anyway or would be 2 stroke oil be better at lubricating?

thanks
Mark

[elford_tim]

I\'d use two-stroke oil as it\'s designed to mix (better) with petrol than regular engine oil...