1994 vs 1995 SLS Fuel Economy

[Devin O'Conor]

I once had a 1994 SLS. While I had it, I took it on a 1000 mile trip and averaged 28.8 MPG for the whole trip. I have heard others getting this kind of fuel economy with SLS's.

This past weekend, I drove my current 1995 SLS approx 650 miles. I averaged ~23 MPG.

Anyone have any ideas why my 1995 is not doing as well? Both trips were at speeds of 70-80 MPH. The 1995 SLS has 120,000 miles where the 1994 had 105,000 at the time. Both cars are/were very well maintained. Could my 1995 need Oxygen Sensors? Any ideas?

Oh yeah....how many Oxygen Sensors does a 1995 have? It is OBDI. I couldnt see any O2 sensors before or after the Catalytic Converter. Are there only 2?...one in each exhaust manifold?

Thanks in advance!

Devin

[Mark Grek]

That is what my 95 sls gets on the highway, I also think tires play an important role on milage. I say that because as soon as I took off the original tires that the car came with (Michelin XW4's), and put Michelin Pilot XGT H4's, which is more of sticky type tire, I lost 3 miles per gallon. With the old tires I got 26 mpg.

[JasonA]

I have Michelin Pilot XGT H4s on mine and get 29-31 mpg on the road. Maybe when I replace them, I can hit 35 on a trip!

[calif phil]

Sometime fuel can be a factor in MPG. I know the winter fuel and oxygenated fuel both lower the MPG.

[Mike S.]

I got about 25 with my 94 SLS on my 2,000 mile trip from the Dallas area to Minneapolis and back a couple months ago. I probably averaged around 80mph most of the way.