Guest TurboSedan Posted April 26, 2005 Report Posted April 26, 2005 does the '94 L27 need high octane gas? i live at high altitude so my choices are 85, 87, or 91. what should i use? fwiw i used 85 octane in my Cutlass (back when the 3.1 was NA of course) and it ran great for almost 120,000 miles with 85. Quote
mfewtrail Posted April 26, 2005 Report Posted April 26, 2005 Run the 85. Our "regular" here is 87(I live @ 700' or so above sea level 8) ). Quote
Guest TurboSedan Posted April 26, 2005 Report Posted April 26, 2005 kick ass gas is freaking ridiculous right now. when i drove my GTS i had to use 91 and that costs $2.349/gallon right now! buying 85 would be a relief. thanks Matt Quote
J Posted April 26, 2005 Report Posted April 26, 2005 i wouldn't run that lawnmower gas through the turbo engine, but thats me. Most forced induction cars require premium, so i'd at least use 87 Quote
cutlsp Posted April 26, 2005 Report Posted April 26, 2005 i would try the lowest grade gas if the car pings go up a level if it still pings well looks like you have to use premium :? Quote
THe_DeTAiL3R Posted April 26, 2005 Report Posted April 26, 2005 I'd use 87, or try a 87/85 mixture. It's not supercharged so you should be fine without premium. Quote
mfewtrail Posted April 26, 2005 Report Posted April 26, 2005 It's a 9.0:1 compression NA 3800 for god's sakes, at his altitude, 85 octane is adequate. L TWENTY 7, not sixty. 8) Quote
digitaloutsider Posted April 26, 2005 Report Posted April 26, 2005 Werd. The L27 and 87 octane is half of the reason I bought an SSE over an SSEi (other reason was insurance) Quote
Guest TurboSedan Posted April 26, 2005 Report Posted April 26, 2005 Werd. The L27 and 87 octane is half of the reason I bought an SSE over an SSEi (other reason was insurance) that, and it seemed like most SSEi supercharged cars i came across were beat on compared to the NA SSEs. in a way i prefer the L27 simply because i think it's more reliable without the SC, gets better gas mileage, and of course, it's just going to be my daily driver. my Cutlass on the other hand, gets modded Quote
99RegalGS Posted April 26, 2005 Report Posted April 26, 2005 It's a 9.0:1 compression NA 3800 for god's sakes, at his altitude, 85 octane is adequate. L TWENTY 7, not sixty. 8) All series 1 3800's are actually 8.5:1 compression. 85 should be plenty for the L27. Quote
mfewtrail Posted April 26, 2005 Report Posted April 26, 2005 It's a 9.0:1 compression NA 3800 for god's sakes, at his altitude, 85 octane is adequate. L TWENTY 7, not sixty. 8) All series 1 3800's are actually 8.5:1 compression. 85 should be plenty for the L27. Blame Shawn(j/k!), that's what's on the main site. Also, it's reported as 9.0:1 by a lot of other places. Where did you find the 8.5:1 figure at? Quote
Grand Moff Joseph Posted April 26, 2005 Report Posted April 26, 2005 go with 87. Not as $$ as 91, but not as crappy as 85 Quote
chadz34 Posted April 26, 2005 Report Posted April 26, 2005 No the L27 doesn't require high octane but I would use 87 octane and put the odd blast of 91 through it. That should keep her running like a top. Quote
Guest TurboSedan Posted April 26, 2005 Report Posted April 26, 2005 i'm going with 85 due to my elevation and the L27 isn't high compression. and it'll save me money of course. Quote
cutlassdude96 Posted April 27, 2005 Report Posted April 27, 2005 8.5:1 is the SC 9.0:1 is the N/A Quote
99RegalGS Posted April 27, 2005 Report Posted April 27, 2005 Blame Shawn(j/k!), that's what's on the main site. Also, it's reported as 9.0:1 by a lot of other places. Where did you find the 8.5:1 figure at? I used to think the 93+ L27's had 9:1 compression (that's what the chiltons manual said, older ones had 8.5:1 according to the manual). Then someone on a different forum said he knew the compression was 8.5:1 on all series 1 3800's. Seems like he knew 3800's, so I believed him.... Quote
mfewtrail Posted April 27, 2005 Report Posted April 27, 2005 Blame Shawn(j/k!), that's what's on the main site. Also, it's reported as 9.0:1 by a lot of other places. Where did you find the 8.5:1 figure at? I used to think the 93+ L27's had 9:1 compression (that's what the chiltons manual said, older ones had 8.5:1 according to the manual). Then someone on a different forum said he knew the compression was 8.5:1 on all series 1 3800's. Seems like he knew 3800's, so I believed him.... Sean, do you have your owners manual still for your 93? I got my dad to look in his 1994 owners manual last night and he said they didn't even list the motor specifications(I know my 93 GP's owners manual lists the specs for the available engines that year). Quote
99RegalGS Posted April 27, 2005 Report Posted April 27, 2005 My owners manual only lists specs like amout of coolant, oil, etc...... Quote
89GPSE Posted April 28, 2005 Report Posted April 28, 2005 Where do you guys get gas? Gas here in Buffalo only chices are 87 at $2.29Gal, 89 at $2.34Gal, 91 at $2.39Gal, or 93 at $2.44Gal. Never heard of 85. Quote
Guest TurboSedan Posted April 28, 2005 Report Posted April 28, 2005 Where do you guys get gas? Gas here in Buffalo only chices are 87 at $2.29Gal, 89 at $2.34Gal, 91 at $2.39Gal, or 93 at $2.44Gal. Never heard of 85. 85 octane is available in high elevation areas. i live at 4500ft so 85 octane is fine. the highest available here is 91....again because of our elevation. Quote
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