Mileage drop

AZScout · **Posted:** Thu Aug 04, 2005 1:23 am

I recently noticed a drop of about 50 miles per tank in my CRD. I've done two things recently and am trying to figure out which has caused it...

I did an oil change switching to Mobil 1 5w40 since Wally World didn't have the 0w40. I would've preferred Amsoil but really expensive. Is the 5w40 that much thicker that it would drop the mileage?

Also, I had the TSB 18-018-05 recently even though I didn't have the "shudder"...it was in the shop for overheating and I asked to be updated with that TSB since the Jeep was in there.

Has anyone switched their oil and noticed a change or had the TSB done and seen their mileage drop?

Thanks!

Dave

LibertyCRD · **Posted:** Thu Aug 04, 2005 10:43 am

0-40 is impossible to find around here so I'm doing an oil change with 5w40 from wal mart myself tomorrow night. i'll let you know if mine drops too.

n3qik · **Posted:** Thu Aug 04, 2005 7:08 pm

I will bet its the EGR valve.
Have you noticed it to be a little slower of the line from a dead stop ???

Had mine in due to CEL, bad EGR valve, it was slow as a snail of the line but run very well above 2000 rpms. Now waiting 3-4 weeks for new part.

I disconnected the EGR valve electrial connector, it runs 1000% better and seeing an .3 MPG improvement going by the overhead VIC.

Something to look at.

RBorgers · **Posted:** Thu Aug 04, 2005 9:23 pm

The dealership replaced my EGR valve today. My CEL had come on and my mileage started dropping. It only took them 4 days to get the new EGR in. Could not have asked for better service, they gave me a loaner and asked to keep my CRD overnight just to test drive it and go over it. I picked it up this morning and managed to put about 80 miles on it running errands. So far it seems to be running great, seems a little smother. Can't tell about the mileage yet, but after 80 miles it right below full.

kj lad · **Posted:** Fri Aug 05, 2005 8:17 am

Check your air filter. I had a drop in mpg and so I started to look for a solution and my brother told me that he reckoned the air filter was dirty. I checked and it was so I changed it. Now I'm back to 29.1 mpg (UK gallons).

Ian

tomasnc · **Posted:** Sat Aug 06, 2005 11:53 am

I know these CRD's are still under warranty but can't the EGR valve be washed out with carb cleaner or a similar solvent?

Thanks,

Tom

n3qik · **Posted:** Sat Aug 06, 2005 9:42 pm

The problem will only return. My guess is the dirty US fuel is partly to blame for the failers.

Looks like 3-4 hours to remove and reinstall it. Do not want to do that every 4K miles.

Mileage drop

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