Jerry Posted September 20, 2003 Report Share Posted September 20, 2003 I was wondering which grade of fuel everyone is using? I have run regular since day one, and my truck runs great!!! I'm afraid if I switch to premium there might be such a difference I may not want to swith back..I drive about 500 miles a week and the difference in fuel costs is significant. Link to comment Share on other sites More sharing options...
SinisterSS Posted September 20, 2003 Report Share Posted September 20, 2003 Mobil or Amoco 93 since day one. Mostly Mobil since it is closer to home. Link to comment Share on other sites More sharing options...
ginnie ss Posted September 20, 2003 Report Share Posted September 20, 2003 Richard, thanks for the info, I too want to run 93 in it.. The Dealer told us 87 octane??? We didn't think that sounded right. Ginnie (93 gas is going for about $1.69 in our area) Link to comment Share on other sites More sharing options...
TimB Posted September 20, 2003 Report Share Posted September 20, 2003 92 Link to comment Share on other sites More sharing options...
rico750sxi Posted September 20, 2003 Report Share Posted September 20, 2003 Mobil 93 octane. As far as the dealer telling you 87, the gas filler door on mine has a sticker that says premium only. Link to comment Share on other sites More sharing options...
Lee Posted September 20, 2003 Report Share Posted September 20, 2003 91 which is the highest allowed by law in AZ. Why? I don't have a clue??? Which, I guess, I can add to the long list of other things I don't have a clue about. Link to comment Share on other sites More sharing options...
56chevywagon Posted September 20, 2003 Report Share Posted September 20, 2003 I've had to run 87 for the last 4 tank fuls , prior to that, 91 all the time. The gas prices are so high here in Cali, I couldn't afford $2.35 a gallon/ $45-$50 fill ups every week, that was the price on base, but prices are going down so on the next tank, back to 91!!! Link to comment Share on other sites More sharing options...
black03ss Posted September 20, 2003 Report Share Posted September 20, 2003 Amoco/Bp 93 oct. since new . the manual says you can run a lesser grade but go to a higher if it pings/knocks.. I paid 1.95 a gallon today. Link to comment Share on other sites More sharing options...
gserep1 Posted September 20, 2003 Report Share Posted September 20, 2003 This is very interesting. Before looking at the Silverado SS, I looked at the Escalade, which has the same drivetrain, and the Cadillac dealer also said regular. I don't know what to believe. Regular works fine. Here in San Diego, I have seen premium gasoline as high as..(GULP) $2.79 a gallon at a UNION 76 station. Understandably, NO ONE was in the station buying gas, lol. This is not the first time I have had this debate. I also own a 1998 Cadillac Seville STS with the 4.6L Northstar engine..(inherited from my father) The book says 91 or above octane, and yet when I took it in for service they also said regular only. They claim it runs cleaner and leaves less deposits on the valves. Since 2001, all the Cadillacs boast of using only 87 octane. I guess it depends on the particular car and if the engine pings or not. Sometimes 2 identical engines have different requirement....GO FIGURE!!! GSEREP1 Link to comment Share on other sites More sharing options...
SinisterSS Posted September 20, 2003 Report Share Posted September 20, 2003 The 6.0L LQ9 is a premium engine running 10:1 compression befitting a premium brand truck in the SS and people want to put regular in it? If the $2 more a fill-up is going to cause someone to go broke, how can they afford a $40k truck? Put premium in it already, a truck of this caliber DESERVES it. Rant off. ;) Link to comment Share on other sites More sharing options...
mwalls54 Posted September 20, 2003 Report Share Posted September 20, 2003 $2.35 a gallon/ $45-$50 fill ups every week wow thats what racing fuel costs here. 93 is 1.67 so thats all i use Link to comment Share on other sites More sharing options...
Scooter Posted September 20, 2003 Report Share Posted September 20, 2003 93 all the time, unless I'm at a sunoco and then 94 Link to comment Share on other sites More sharing options...
SSminneapolis Posted September 20, 2003 Report Share Posted September 20, 2003 92 or 93..depends on what gas station i go to... Link to comment Share on other sites More sharing options...
setti Posted September 20, 2003 Report Share Posted September 20, 2003 I'm running 93 mobil. Blower running 7lb boost(93 octane min.) Scooter 94 sunoco . love to run that. When I bought this truck fuel cost was the last thing on my mind. Link to comment Share on other sites More sharing options...
peter fogg Posted September 20, 2003 Report Share Posted September 20, 2003 SSers I run Sunoco 94 or Mobil 93? There is a decal that states premium only! Link to comment Share on other sites More sharing options...
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