I have my car all torn apart and need to know the size of the gas tank b/c when it goes back together the OMP wont be.. so i am gonna run premix.. i have 1/4 tanks and need to know how much 2stroke to put in..
thnaks,
Dave

 

The s4 tank is 16.8 US gal and the S5 is 18. Not sure about the s5 though ince I don't own one.

 

I think 89 <?> was the year it went up so much. I think they went back to a 16.6. My vert holds 16gallons when I fill it from right at E.

 

thanks, guys.. ya my car is a 87..
Dave

 

Why don't you just drain it so you can get the correct mixture.

 

S4 was 16.6
S5 was 18.5

and a fill up of 16 gallons would be exactly right for a 18.5 gallon tank, as would a fill up of 14 gallons for a S4 tank.

Another reason why the S5 was heavier.

 

Manufacturers quote dry weights, so the size of the fuel tank will make a negligible difference to those figures. Besides, that 1.9gal extra fuel only weighs 12lb. If you really want a lighter car, just put less gas in.