|reply to IowaCowboy |
Re: [Tech] Which grade of fuel should I use
Says regular meaning 87. If you are experiencing knocking then there are other issues involved. The higher grade fuel is compensating for a already existing problem which prevents the knocking sound. I would have it checked before assuming that a higher grade fuel is recommended for your vehicle when the manual would state it was "designed" for regular.
Some vehicles do perform better at a higher grade fuel but that information is also stated in the manual as well such as 93 ideal but 89 works and 87 is unacceptable.
Do not put a fuel that's not recommended by the vehicle manufacturer unless you want premature failure of certain engine components.