I live in Wyoming and use 85. Here we have 85, 87, and 91. What do you use in your xj and what are the pros and cons of the different types of gas? Was on the forum while filling up and thought of this..

 

I use 85, the pros are, it's cheaper than the higher octane ones, the cons are the extra cash weights down my pants a little. $$$$

 

we have 87, 89, and 93 here. i use 93 because its 5 dollars more per tank and it gets better gas mileage

 

85 is prone to pre-detonate for me,93 burns too slow and I get some misfires/backfiring

I don't really see 91 too often considering I go to bp most times.

87 is perfect,and gives me optimum mpg's

I have a renix 4.0

 

I go for the mid-grade. Runs great. '98 4.0. I think it's usually 87 around here in PA.

 

G'day.
Down here, we have 91 E10, 91, 95 and 98.
I mostly use 91 or 95. E10 is rubbish and rots everything. 98 is too dear.

cheers

 

michigan here has

87, 89, 91 or 93 depending on station

i always run 87 octane, but i might switch to 91 or 93 and see if my mpg goes up

its about 20 cents more per gallon here....but if you fill up with 10 gallons it is only 2 dollars more...so not a big problem

 

87. More importantly is the brand and mixture. I try to get my fix of Shell, if I can't I'll grab Petro-Canada. For the reason why, see http://www.toptiergas.com/ and most threads regarding fuel economy and emissions tests.

Btw the guy who "has to" run 91OR in his 8.7:1 compression engine - you probably have the wrong spark plugs or some carbon build up.

 

I used to always buy Mobil gas 89 or 91 octane, it costs a bit more but does get better gas milage so I'm usually ahead in the long run. I do have my engine light on too.

In my DD (03 VW Jetta) i've had my engine light on for a year or so, dealer said Cat is dirty... I changed to Sunoco gas 91 octane, light went out & hasn't turned back on for 2 months now. Gonna change to Sonoco gas & see if it does the same magic!

 

87 octane, wherever its cheapest. We have 87, 89, and 91.

 

If you live at higher altitudes, 85 is fine.

Generally speaking, run the lowest octane that does not cause pinging or vapor lock.

Anything more is wasted.

 

Mines Dual fuel,so i use LPG and 99 ron Shell Vpower.......

 

Don't ever bring it to the States. You will have to remove the LPG sprayers and the tank.

 

I run the 87 from Wally-World as it is the cheapest around here. I've tried gas in different octane from different places and can't tell the difference in mpg's. I have a '91, 4.0 on 3" and 31's with 3.55's. The higher price of "better" gas just doesn't seem worth it for me.

 

Ever run SeaFoam through before? All that **** that comes out as smoke doesn't happen with good detergent fuels.