I'm so happy for you!
I've recently had the opposite happen. My hot royal blue GT PT has always had the best synthetic oil in him - ran great - got anywhere from 22-23 mpg (winter blend) and even up to 30 mpg one summer driving the freeway (probably way over the speed limit - shhhhhh
) through the Mackinac Bridge of Michigan! He averages about 25 mpg. That's always been a funny thing - the faster I go on the freeway - the better the gas milage! It was the same with my previous PT (01 - non GT).
Anyways - now for the sob story. I had my spark plugs changed in December. When I drove it out the gas milage immediately dropped to 16 mpg. I know my baby - and something is obviously wrong. I took it back 3 times, got charged an 80$ diagnostic fee each time and they changed a 10$ part. No change in mpg. I then got it to 17 mpg. BIG WHOOPIE! I decide my life is over as my sexy blue PT is dying on me. How could I ever live without him! I love him!
I decided to change the oil last week since the window sticker said it was time to. I was baffled when I took off the sticker to hand it to my regular oil change guy.
The sticker had the mechanics name on it instead of my fantastic oil change place that I've used for 15 years. Revelation! -
when they changed my spark plugs, did they change the oil too and put old petro based oil in it? Is this the root of all evils? The oil change place could not confirm that it was petro oil drained out last week, but I have the sticker to prove that the mechanics changed the oil in December.
I have not driven enough to see if the milage changes - but I'll keep you posted. The concern now is I'm told what the mechanics did could have caused engine damage. It's ok to change from petro to synthetic - but not vice versa - from what I'm told. I'm trying to find out! Any ideas on where to go to find out?
Jennifer