My volvo s70 glt non turbo....
when i'm on the highway just cruisin, at 65 mph my
rpms are at 2500.....and at 80 mph theyre at 3000 rpm....
is that normal?? seems like they should be lower

 

my 99 s70 turbo runs 2000 rpms at 59mph and 2400 rpms at 70.

 

Mine is also getting an average of 16 mpg.......and ive
heard that the s70 usually gets 20.....do you think there
is a way to adust the level of rpmsVS.speed?

 

i would do a stage zero. i.e. filters, plugs, oil, tranny fluid, ect. and get it running in tip top shape, then drive her nice for awhile and see if it doesnt help.

 

Ive done about half of my 'regular new car tuneup' since ive owned
it, (oil..cleaned spark plugs..P.S. fluid..) Ive yet to change the
others seeing as $$$'s been kinda tight lately. but I'l do it as soon
as i can. It actually had a huge power steering fluid leak when i
aquired it... 1.5 cans of Lucas' P.S. fluid leak sealer later, No leak at
all!!! It also had a pretty decent head gasket leak. I did some research
on it and decided that I didnt want to tackle the whole head gasket
replacement thing right now. so I went to autozone and bought a
a minimicro molecule head gasket rebuilder/sealer. 'drain coolant
system...flush...refill with sealer...idle for 25 minutes...drain...let
car sit for 12 hrs...flush...refill with antifreeze...good to go.
It worked beautifully!!! obviously it's just a temporary thing but
i couldnt believe how good it worked!

 

well, thats great that those sealers worked so well. well, im not sure what else to check other thatn the new car tune up regulars.

 

I believe that S70 should get around 22 in the city and 28 on the highway. How are you checking gas milage? Do you have a trip computer in the car?

Also, I will check the rpms on my S70 GLT. It should run the same. I think they are running about what you stated.

 

I checked out S70 GLT today and at 65 the rpms are 2350 and at 80 they are 2900.