Discussion in '1982-Present GM Diesel' started by 76zimmer, Jan 7, 2020.
After bedding the pads in with the rotors per the procedure, Ive been taking some temp readings after driving a bit...temps running within 7* of each other @ 120-160 depending on usage and how soon I measure them, right rear started out about 20* hotter than the others, but is within 10* now.
Also, I cant remember how long its been since diesel was less than gas, but I filled up today for 1.81/gal @ Sams club. Regular gas was 1.91/gal.
So far the only place I’ve found pure diesel is in Michigan. Two other fill ups have been labeled as 5-20% biodiesel.
Not sure if this year Duramax is approved for that?
I don't think it's a big issue Zim. The seals, filters, and injectors are the same as other diesels
I was concerned because my brother (heavy equipment mechanic) has seen some pumps go bad and coincidentally many were on biodiesel. I’ve been putting some Amsoil treatment in each tank as well.
I think it really depends on the percentage. That range shouldn’t make a huge change in the ph, make sure the next tank to not run it if you are concerned
In the Midwest here it'll be hard to find any non bio.
As long as you use additives you will be fine
Truck performed great. Air temps were up to 97* in places.
Max engine temp was 215 and trans maybe 210... happy with that!
Fuel was $1.81-2.42/gal. Mileage was 8.5 to 11.2. Seemed to be in the wind most of the trip from the tropical storm in the beginning, and just strong south east winds into KS and headed home to MI.
Brought home a 64-C10 from @eodcoduto
Biodiesel is safe in all diesel engines, will also lubricate the fuel system better than any additive.
Just don't store it for 6+ months without a great water separator system because it attracts water more than petroleum diesel.
It's not the lubrication that I found lacking but the power which is where the additive helped.
I had plenty of miles on both, did more than a million miles in the past 12 years, biodiesel never got me the mileage #2 got, but I didn't have trouble running it.
I didn't run all the time but a couple of times I sat for a month and had no problem. Now it has been sitting for 8 months and I drove it 30 miles a couple of weeks ago, luckily nothing happened but I have been using b5 not b20
The pumps that have bio in IL, IA, KS all were tagged 5-20% with no distinction on exact amount. I added cetane boost and conditioner to every tank.
Yeah they used to specify.
Indiana ran b11 Illinois used to be b20.
Never filled in Kansas.
Here in California it's all b20 except Costco is b5, until they change.
In Utah, Wyoming and Colorado it's been either b20 or regular #2.
I went from 19.2 mpg empty doing 75 on interstate from FL. with Cooper 245/75’s down to this low of 9.0 with 265/75 Duratracs towing 7k on the interstate @ 75.
Odometer mileage shows consistently 2% less than actual measured mileage over 50 miles on the highway markers.
Speedometer reads about 2mph slower than actual, measured by time/distance and gps.
I never paid mach attention to my mileage while towing. Mostly because I usually don’t tow for a full tanks worth. Definitely goes down but I don’t know about half. But when I do tow it drive like a pussy because my trans like to limp...
It didn't show or feel any different, and Im not easy on the throttle generally, but yeah, cut in half was a bit surprising.
Rivaling my stock 95 medium duty with those numbers when I'm burning the 40 year old diesel fuel haha. 15mpg empty, 10-12mpg at 23-25k combined weight with that fuel. But that old fuel has noticeably less BTU's and the truck is at 2450rpm for 60mph (peak 6.5 fuel economy is around 1900-2200rpm). After this next trip all that old fuel will be used.
These Powerstop brakes are kick ass.
Best brakes Ive ever had on a GM truck.
All rotors run within 10* of each other now that I got a few miles on them.
They pull the truck down quickly even when pulling the 3700# car hauler using no trailer brakes.
Its great to have a working parking brake too!
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