Author Topic: 34mpg :) (Read 6484 times)

///m42 sport · « **on:** June 02, 2009, 09:48:36 PM »

My recent trip

195/65 falken ziex

33psi front tires
35psi rear tires

65mph for 220 miles

I thought that was pretty cool for 280k

tjts1 · « **Reply #1 on:** June 02, 2009, 10:08:29 PM »

Nice!

monty23psk · « **Reply #2 on:** June 03, 2009, 12:54:52 PM »

cool, how much gas did you start with?

1991 E30 M42 · « **Reply #3 on:** June 03, 2009, 01:58:48 PM »

When I go to Virginia Tech that's what I average but all of my stuff is different.

Kumho Ecsta SPT 205/55 r15 front 35psi
Toyo T1R 225/50 r15 rear 35psi

310-330 miles depending on any stops
80mph

3.73 rear diff

recently made 180hp on dynojet

DesktopDave · « **Reply #4 on:** June 03, 2009, 02:03:00 PM »

I'm in the middle of a long trip, so far it's been ~33mpg for me too. I'm very pleased, especially for 266K. Summer mix gasoline is great for mileage, and using 91 octane with <5% ethanol (Here in PA they have to admit if there's more than 5% alcohol in the mix). Our winter mix would give much worse mileage, I'm sure.

40psi F&R 195 14's, 3.73 diff. No A/C (needs converted), windows closed. Missing front spoiler makes me wonder how much better I can do. If only this car had cruise control!

Avg 68mph with drafting a lot of big rigs and SUVs. Hummers ARE good for something, now aren't they:D.

Be careful not to draft too close - I usually do 30 yards or so...you can 'feel' where the sweet spot is sometimes. I'm told that it's still close enough to cut air resistance 10-15%.

monty23psk · « **Reply #5 on:** June 03, 2009, 02:59:30 PM »

Not wanting to burst any bubbles but if you are doing 330 miles on a full tank, 330/13 you are getting ~26 mpg. Am I missing something here? Do you guys have a 10 gallon gas tank? The stock e30 91 318is comes with ~13.1 gallons.

1991 E30 M42 · « **Reply #6 on:** June 03, 2009, 03:14:30 PM »

if i am getting 34 mpg, divide 330 miles by 34 and thats how many gallons i used, simple math, neither of us said we used a tank of gas, we just said the mileage

monty23psk · « **Reply #7 on:** June 03, 2009, 03:35:47 PM »

gotcha, that was the part that was throwing me off. thanks and excellent mileage.

///m42 sport · « **Reply #8 on:** June 03, 2009, 03:43:03 PM »

I started with a full tank and filled up when I got home so I know its pretty accurate.

I don't have a is lip either. Used to but it was torn off by semi tires on the highway

tjts1 · « **Reply #9 on:** June 03, 2009, 08:41:27 PM »

Quote from: DesktopDave;72966

40psi F&R 195 14's, 3.73 diff. No A/C (needs converted), windows closed.

Don't convert to R134. Get duracool

DesktopDave · « **Reply #10 on:** June 04, 2009, 06:10:01 AM »

Quote from: tjts1;72987

Don't convert to R134. Get duracool

Haven't heard of that...so I checked out their website. How much would you estimate to fix our system? It's functional, just low on R12.

tjts1 · « **Reply #11 on:** June 04, 2009, 08:57:26 AM »

You can mix duracool with R12 so all you need is 2-4 six oz cans, an R134 adapter low side adapter, R134 hose with gauge and a thermometer for the vents. As long as your system holds pressure, you can just dump duracool on top of R12. You should have it going for less than $40.

1991 E30 M42 · « **Reply #12 on:** June 04, 2009, 02:42:11 PM »

duracool is the same thing as hotshot or freeze12 wich are propane or butane based.

tjts1 · « **Reply #13 on:** June 04, 2009, 03:31:31 PM »

I don't think so.
Freeze 12 80% R-134a and 20% HCFC-142b.

Hot Shot 50% R-22, 39% HCFC-124, 9.5% HCFC-142b and 1.5% isobutane (R-600a).

DesktopDave · « **Reply #14 on:** June 04, 2009, 03:43:55 PM »

Data seems a little dicey on these. I know that the possibility is remote, but pressurized flammable liquids running inches from family & self seems a little dicey. I'm not sure that r134 would be much more expensive, just a PITA to do. The sheer convenience of refills and reselling also makes me think R134. Has anyone done a full retro-fit?