Oil Question

Hey guys, I have been changing my oil for a long time but yesterday it was time to change it and I went to the store and there were like so many brands and types of oil.
I needed some 5w-20 for my moms new accord. I have been confused by the different types of oil out there. Can some one give me a good brand and type of oil for an turbo eclipse with more than 100,000 miles.
Whats the difference between 5w-20 and 10w-40 ?
Thank you

Ok so from what I've read, 5w-20 gets you better gas milege but kills engine life by almost 30%.
So why do Honda reccomend people using 5w-20??
Also Mercedes ( Including the McLaren ) reccomend people to use 5w-50. So What Oil should I use on a turbo eclipse with over 100,000 miles ???

http://www.synlube.com/viscosit.htm
Bah, too much to read lol. I'm also not totally sure about the oils and other fluids. I've got about another 600 miles before my next 3k mile oil change and I was also wondering what oil I should use. I remember a while back Josh said that Mobil 1 increases lifter tick (I have enough of that already). What oil do you guys recommend? Also, what are the best like tranny fluid, and any other fluids for the car? My friend's dad just got a job at Advanced Auto as a manager and he gets discounts, so I'm gonna take advantage of that and get the good stuff! :biggrin:

Mobil1

Yeah it ticks on some cars (mine), but still my fav

the W in 5w 20 stands for winter or weather (not weight like most people think) the 5 stands for how thick the oil is when the engine is at 32 degrees F. The lower the number, the less thick it is. The 20 is how thick the oil is when the engine is warm. For winter most people put 5w 30 in their cars b/c the oil is thinner when you start up the car, so it makes it start easier.

Doesnt the cap say 10w-30? I would put whatever the owners manual or cap says. Josh did say that Mobil 1 has detergents or something that our engines dont like, but most of the people I know use Mobil 1. Josh recommended Valvoline full synthetic, if I remember right.