I have read so many different opinions on how much oil to add to my gas with a omp removal. can anyone give me a definite answer? preferably in litres and millilitres

 

https://www.rx7club.com/old-school-other-rotary-63/rx-sprite-premixer-848529/ try that

 

You see different numbers because the amount depends on the engine and driving conditions. For example, non-turbo racing engines usually run on a mix of about 0.7 oz per gallon for lighter levels of racing or 1.3 oz per gallon for higher-stressed peripheral ported non-turbo engines, while turbocharged racing engines in the 600hp range are up to about 4.5 oz per gallon.

http://www.digitaldutch.com/unitconverter/volume.htm