I have a GMC terrain 2017 with over 270,000 miles. Hardly any problems with this car. Lately is been making slight clicking noises after driving over 4 to 5 thousand miles and when I changed the oil they put a small bottle of gas treatment in the tank and the clicking noise went away. Then again after certain miles close to have the oil change again started with the clicking noise so I repeated the process with the gas treatment and clicking went away. My question is will it be a good idea to put premium gas to the car? Will better gas will keep the clicking away until I take it to my mechanic?
Newer vehicles have higher compression ratios than older vehicles. The knock sensor keeps advancing timing until it recognizes knock and retards timing again. Newer vehicles can benefit in HP and MPG gains from premium fuel. The premium will not have ethanol in either which is a good thing. My 2015 Silverado does better on mid grade and even better on premium. Only time I run better grade is when I tow and it does make more power and my OBD scanner confirms the timing stays advanced more thus more power and MPG.
Yeah, I wouldn’t count on this. Unless you’re at a rare gas station that has ethanol-free gas, the premium still has ethanol in it everywhere I’ve seen. If you do find one that has ethanol-free fuel, it’s usually $1.00-1.50 more/gallon than competing stations with E10.