My truck is fine at our altitude but 85 will ping driving in the mountains so I go no lower than 87 with an occasional 91 tankful to burn out the bad stuff.

 

I always run 87 here in CO, but the occasional 91 gets in there every now and then.

 

I've been running 87 and I can hear some pinging once in a while on a really hot day.

 

I run 89 octane.

 

80 proof

 

At $2.91 per gallon.

87

 

I've never put anything put 93 octane super in my truck. Mainly Shell, BP/Amoco, and Chevron. Good detergent gasolines.

 

Dang, and I thought $2.50 a gallon for 93 super was expensive. Man, I wouldn't be driving at all.

Matt

 

95, sometimes 98 octane

 

93 octane ONLY!! Otherwise she runs like crap and pings...

 

out here today it was 90 degrees, and the run from DIA with luggage and a/c going it was pinging under load with our 87 "mid-range" colorado octane. most of the time it's OK, but pulling the tunnel during boarding season brings some ping. never an issue with 91, if you can afford it.

 

When Im feelin spendy, I run jet fuel.

 

Here in Poland we've got only 95 or 98. Runs good.

 

Same here , I wish it was cheaper :cry:

 

You're right.

 

A quality 87, something with detergents (ie Texaco with Techron).


Can running a higher octane than needed cause deposits?

 

yes, it can cause carbon build-up.

 

Jet A = Kerosene = Diesel

Jet A = about $2.40 now.

 

I always run 88 or higher.

ratings in my area
regular 86
plus 88
premium 90-91

Plus right now is $2.54/gal. was $2.35/gal last week.

 

i run 87 most times. here & there (1 in 20 fillups max?) i run 89.