If your owners manual says 5W30, don't put 10W30 in it. You may damage your bearings. If anything you may want to try a 0W30. 10W30 is old skool, for engines with tolerances that were not built to the tighter tolerances that engines are built to today. My recommendation is that if the manual says 5W30, use that. Don't switch.
The differences between 5w-30 and 10w-30 are minor, and some brands of each overlap the other weight at thr 40*c viscosity. I wouldn't see this as an issue. They are, after all, 30 weights at 100*c.
See This Page, at the bottom, "Oil Type Comparison".
That thing looks like it is in really good shape for a 1996.
40mpg in the city is great mileage. Those Metro's were pretty good.
Anyway, I think you should get the A/C fixed. When you need A/C you need it. No sense in suffering. I did that too many times in the past. I am all for good gas mileage, but sometimes you just gotta turn on the A/C.
My Galant didn't have working air when I got it, but luckily it is fixed now. Some people here can go without a/c, and that's fine. I just got tired of going to meet friends for dinner dripping wet from sweating so much and my shirts always being wrinkled in the back.
The Geo looks great. Be warned though, the sedans do not get as great of fuel economy as the earlier model hatchbacks. They have a bigger motor in them. FE is still pretty good though.
It may not be GREAT gas mileage, but 35-40 mpg is a HELL of a lot better than the 15-16 mpg that my F150 gets!
i also took action i sold my 97 eclipse 18mpg for $3600 and now i drive a 97 civic coupe dx for $4000 that gets 37mpg thats just with some improvements. the saving outwight the luxury of having power windows the only thing i miss about my eclipse.
No you don't.
I spend a lot of time in my car not just commuting, and you most certainly do not get used to it. I sweat like a white man in Harlem. I've been in Florida since 91 and I'm still not used to it.
Ignorance is lack of knowing; stupidity is false logic