Can I use 87 octane gas in a '99 Merc 250 EFI?
I was told to run at least 89 but that 93 was preferable, and that 93 runs a bit cooler.
I've been using 89 but wanted to see if I could just start using the 87 from the corner gas station, as it's like .70 cheaper per gallon.
Is there a higher compression ration in an EFI engine than a carbed engine? I've always had carbed engines and always used 87 octane in them, so I'm new to EFI even though EFI isn't new.
Thanks.
I was told to run at least 89 but that 93 was preferable, and that 93 runs a bit cooler.
I've been using 89 but wanted to see if I could just start using the 87 from the corner gas station, as it's like .70 cheaper per gallon.
Is there a higher compression ration in an EFI engine than a carbed engine? I've always had carbed engines and always used 87 octane in them, so I'm new to EFI even though EFI isn't new.
Thanks.