We may receive a commission on purchases made from links. Most gas stations have three options that you can put in your vehicle: regular, mid-grade (plus), and premium. These labels are also often ...

Costco’s premium gas, available at locations nationwide, has sparked a debate among drivers about its exact octane rating. Is it 91 or 93? And does this difference have any significant impact on their ...

It''s used to measure the quality ofgasoline (petrol) and defined as the percentage of iso-octane by volume in amixture of iso-octane and n-heptane which has the same anti-knocking propertiesas the ...

Filthy myths run rampant when it comes to understanding race gas. Some say that the higher the octane the slower the burn rate. Others claim that too much octane reduces horsepower. Unfortunately, ...

MILWAUKEE (June 27, 2011) Ideal for use in areas where premium fuel is not available, Screamin' Eagle® Super Octane Boost (P/N 94867-10, $4.95) from Harley-Davidson® Genuine Motor Accessories provides ...