Oil Ratio Help

[HighAgain]

85 suzuki quadracer lt250r

previouse owner was running 32:1 mix

manual says 20:1

bike has been bored out twice but bore is unknown

friend says stay a 32:1 because of thinner walls in jug

any thoughts ?

Highagain

[Drew67420]

20:1 was by 80's oil standards. Todays oil is a lot better. Thats my take on it, and i think that has been said a few times on here, can't remember who said it tho.

[Kane]

Maybe if you're using 10-30wt for castor. Using modern oils you'd use the oils recomended mix or maybe a tad more, but not any specific mix for ALL oils. Besides, thinner walls would mean a richer mix not a leaner one. 20:1 is much richer with oil than 32:1. Your friends not only wrong, hes got it backwards. Even then, I wouldnt worry too awful much about thinner walls unless you're at the last possible bore, and even then I'd mix normal. Using a decent oil will make all the difference.

[gixxer1kr]

U definately want to mix your permix at the oil manufactureres recommendation for your CC size.It will say it on the back of the container.Most are 32:1 and some better oils are 40:1.I am running Amsoil at 50:1.Which i believe is the only one out there that is said to be best mixed at that ratio.As time progresses 2 stroke oils improve.LOL.And thats a good thing.And buy a viscosity cup.It helps.Try to stay with one brand and mixture so u can jet to that mix.

[wicked251]

Run Amsoil Dominator at 50:1 and never worry again.