1994 w124 estate 280 poor fuel economy

[robbieesprit]

Update/ issue resolved!! for Poor MPG
To be fair to me, there were no symptoms of the cause whilst driving the car when i started the thread...but the issue was...piston in rear calliper sticking, causing brakes to be lightly on.
It came apparent when the brakes wore out. So a new set of EBC ordered from ebay, and the my local garage serviced the calliper...all good, now enjoying some what more spritely performance!!
So I use the E5 petrol 97 ron.
So prior to piston/ calliper issue mpg = 18.
After repair 29.5, which on a long run (no stop start traffic) must be about right for an old w124 E280 with 150k on the clock, certainly on par with my E320..

One thing I was looking into (prior to the repair) was having the injectors serviced at £30 each, but with mpg at 29.5 might not bother and just run redex/ injector cleaner through.
Anybody had their injectors tested/ serviced, is it worth doing? is there a cheap source of new injectors out there? MB want £200 each

Cheers

 

[grober]

Know the old saying "if it aint broke don't fix it!"?

 

[GP801]

Well done. That sounds spot on. I once checked ours on the run back from Italy. First part was terrible weather with speed no more than 60mph. Second part much better with most completed at an indicated 75mph. First section around 31mpg, second 29mpg.