What is the formula to work out my optimum revs at speed with my engine capacity?
dont know a formula but most cars get the best mpg in high gear or od 40-50 mph you can test it buy driving the car once you get moving let off the gass then the car will slow down thare is a point ware the car will slow less win you notic that point (it is verry sutlemost ppl wont notice it less thay are looking fore the sweet spot) take note that is the sweet spot as sum truck drivers call it just try to mantaing that speed
