What type of gasoline do you fill your 4.4 with?
I know the car requires only 87 octane, but isnt the compression ration like 10.1:1 with these engines? Thats pretty high if you aske me. My tl also has a compression ratio 10:1 but requires premium.87
Anything above 87 is just a waste of money since the compression isn't enough to require a slower burning fuel.
With age comes wisdom. I, too, thought (in my much younger years) it would give me a better driving car to use the highest octane I could find. To add to the better ride, I had to use major brand gasoline, not the cut rate brand. In later years, however, using research and common sense, I came to realize that the cut rate gas companies were serviced by the same gasoline suppliers as the name brands. As well, I also came to realize that the people who design and build the cars I drive know more about the type and octane rating of the gasoline I should use than I do. So now I find the cheapest regular octane gas I can find and pocket the difference. As luck would have it, the closest station to me also sells gas the cheapest in my city.I get tickled sometimes with the "run premium in engines designed for regular" conversations. I've experimented a few times through the years and honestly, could never tell any difference in performance or fuel economy. I owned a 2001 Honda Odyssey for five years. Honda claimed the 3.5 V6 produced 205 hp on regular and 215 on premium. I took a week trip up through Illinois and Indiana from Texas and ran regular on the way out and premium on the way back. I'm religious about keeping track of fuel economy and my log showed absolutely no difference between regular and premium. On the Odyssey forums, there was one guy who confidently proclaimed that he could feel a "big" difference in performance when running premium. I couldn't help but call foul on that one. Assuming Honda's claim of a 10 hp improvement is accurate, I still can't imagine that it would make a noticeable difference, let alone a "big" difference on a 4000+ lb minivan. I know I never felt any performance difference on mine while running premium. I seriously doubt the Rav4 would be any different.
Don't feel bad. You aren't the first to fall for that myth and you won't be the last. It makes sense after all. "Higher" octane, "premium" fuel? It's just got to be better, doesn't it? If the engine is actually tuned for it then yes it is, and for the sake of that engine, don't put anything less in the tank. But if the engine is designed around regular gasoline, putting premium in there won't hurt anything (unlike putting regular in a car that requires premium **) but it doesn't help either and is generally just a waste of money.I Have been such a fool buying higher octane gas for so long