10w40 or 20w50?
 

Waynes 101 book says 10w40 for colder climates and 20w50 for warmer. Since we have both in Maryland, what should I use. I've always used 10w40 in my sedans.

10W40 in the winter
20W50 in the summer

Well said! Now you just need to figure out which is which around here. Seems winter only started about 2 weeks ago :wink:

I just put in 12 qts of Amsoil 5w30, tough call this time of year. I have 20w50 in my honda now and it's waaay too thick for the cold stuff we've had lately. I figure the thin stuff will be good until after the March DE.

20W50 year round!!!! :twisted:

Well, since it's protecting your engine I would go with the thinnest stuff possible. Really. Most damage to most cars is at start-up. So, 5-30 for normal or 0-?? if synth. For hard use, go with what ever won't cause your oil pressure guage to go nuts. Racers like thick stuff, but then again start-up isn't what they are worrying about. Those of us with older cars need it to keep the pressure up. If you are tracking 20-50. If not, I wouldn't go higher than 10-40.

5W30 in SC and 20W50 in Honda has got to be backwards unless that is one very old Honda and one incredibly tight SC. Every thing I have read adheres to the cold start light weight protection theory.

LOL Good point. The 3.6 recieved the 5w30, ~230k mile 1.5l civic usually drinks 15w40, but I mistakenly used the 20w50 for the 3l SC. Oh well.

Or.........

Try one of these from Accusump:

http://www.accusump.com/acc_products/24_006.jpg

and forget about cold startup problems. :wink: :lol:

Jase

p.s. only kidding. Am looking to put one in my tub and was on the page. 8)

Remember to take the Cool Collar off in the winter so your oil doesn't stay cold!!!