28 mpg highway?

I get 22 city since thats all I drive and I romp on it

Yep, Highway. Since I live in the sticks, I do not have to endure citiy driving very often. When I do have to do city driving, the mixed result is 24 mpg.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

trip from Maine to Virginia I consistantly got 25mpg+ at 75-80mph, and i have an injector that isn't popping correctly.

I'm assuming you've adjusted your valves, checked for timing chain stretch, and checked your timing??? Valves can be a biggie.

Many cars from that era have major problems with the accuracy of their odometers later in life.

Someone who confirmed their 30mpg using GPS would be impressive, although I would still be dubious as my E300 which is 2 generations newer technology only manages 31mpg combined city/hwy and it is mucd more efficient areodynamically and drags around less weight.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

I get just over 20mpg city on WVO/Diesel mix. I can get as high as 25 on the highway.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

My 5 cylinder 300SD went from 24.95 mpg to 29 when I replaced the
broken odometer gear (the 12 tooth gear).

It had 10 teeth.
Funny, I was getting about 400 per tank, cruising speeds seemed okay.
I thought I was driving 66 miles to work each day.....

The 300D gets 25mpg consistently, odometer has no broken gears.
But that engine has no turbo.

Not having a 6 cyl engine like your SDL don't know what to expect.
But that timing of the injection pump is critical. Although, I have never
adjusted mine.

I too get baffled by some of the mileage claims. I used to be told that the
300SD would get 33mpg. Never seen that.

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80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250