Recommended Oil / Fuel Ratio For Racing 140hp V4 Evinrude?

[hoodooguru]

I race a 140hp v4 in curcuit racing.
I have higher compression and bigger carbs and currently run 25:1.
Should I run a different ratio? 40:1 for more fuel maybe?
Its a 1985 v4 that did have vro. The motor is in very good condition with even compression. I also run it on 98 octane ultimate fuel we have here in Australia.

[ChrisCarsonMarine]

I would personally run 40:1 up to 7000 rpm,with a semi-synthetic[i like penzoil],just my opinion,but i would gladly take the advise of Al Stoker[racer],if he sees things differently,Chris

[racer]

I will agree 40 to 1 is plenty to 7k

[Ted Stryker]

I agree it should be fine with a quality oil and be sure to use fresh fuel...