moo... I think you car would benefit from the seafoam treatment with that many miles on it. Do searches on the topic and read about it... Even a 30K mile engine will burn up some carbon buildup. I think a thin oil like that would be easier for you to end up burning more oil from the worn out seals and such. I think the last time I got 10 40, or was it straight 40... I can't remember now. Thicker oil will also help quit the engine a little.

 

You can take your pick: burn some engine oil or excessive engine wear.

 

Wouldn't a heavier oil lubricate the parts better... and mean less engine wear, or an I wrong about that? I would think the newer car, with parts not broken in would need something lighter to make sure it gets through everywhere. That's what I think, someone correct me if I'm wrong.

 

In colder climates, the heavier oil will take longer to warm up, thin out, and get into all areas of the engine. That will just lead to increased wear, and worse oil consumption.

The car calls for 5w-30, and Id stick with that year round.

 

I live in Miami, FL, so out here, low 60 would be considered cold and only happens once a year, exept this winter which I think we actually had 2 cold days. So would using a heavier oil in my conditions be bad?

 

Why do shops and auto part stores recommend something heavier for older cars?

 

Because it tends to smooth out the idle. But not much, and any mechanic will tell you this is just a temporary "fix".

 

http://63.240.161.99/motoroil/101.html

It's opposite of what you think.

 

Damn. Well thanks for clearing it all up now.

 

so since i put that 10-40w is it ok , or should i change oil TOMORROW...to 5-20w...... and YEA'll THINK that SEAFOAM is good to go towards, it wouldnt HARM my motor WHATSOEVER?????.....