Gas question

[FullMetal]

Hello all, i was just wondering, my gas tank lid says on it "fill only Regular gas" i was wondering can i put premium in it? the regular is 87 octane then there's 89 and then 91 i don't really remember how much each of them has but can i fill better then 87 octane in it? i got a 98 jetta thanks

[sr20s14zenki]

You can fill with premium if you wish, altho it most likely wont make a difference. performance cars run premium because of higher compression ratios, to combat detonation

[Twin_Cam_Turbo]

Is it the 2.0L or N/A 1.8L? If so its a waste to put anything but regular in it.

[adidas]

only put regular in! ur not gonna see any difference with 91/92

[FullMetal]

It is a 2.0L but isn't 91 or what not octane cleaner? then the normal 87?

[Twin_Cam_Turbo]

Its the 2.0 N/A. Dont waste your money, you will not gain anything, and it may even run worse and reduce fuel mileage.

[Kloubek]

Everyone is right. If your car doesn't require premium, you will gain no benefit whatsoever.

[FullMetal]

I see ok, I just thought it would be cleaner thats all thanks all

[5000Audi]

plus it costs an extra dime a ltr, it sucks having to use premo..

but yeah use reg 87 your car is tuned for it thus being the best grade for it

[revelations]

It wont be cleaner for the engine as you will inhibit combustion slightly with a higher ocatne...plus higher octance fuel tends to sit around alot longer in the UG tanks.

If you want to clean your fuel system, change the fuel filter after youve run a bottle of fuel system cleaner.