i have a 1991 300td and after reading this forum i went down and bought a gallon of pure wesson oil and added it to a full tank of diesel.

so 1 gallon of svo and 15 gallons or so of diesel.

my car ran better and smoother.

it has 140,000 miles, has all of the maintenance records and runs great.

is this blending a good idea or am i just wasting my time?

what is a good ratio of svo and diesel? how much am i improving the fuel rating by doing this and can i ruin my car.

i live in northern california so cold temperatures are not a problem.

thanks ...