I just put some in... is it cool to use ?

Running @ autox tommorow....

Anyone tried ?? died ??

 

Thats what I use in this texas weather.

 

It seems most people use 10w-30 (colder weather) or 20w-50 (warmer weather). The one to stay away from is 10w-40 with it's additives.

 

Jon, I use 10 w 30 and it works great, haven't had a problem yet

 

20w 50 for me

 

Cali 20w50

 

20w 50 for me too, castro gtx, i live in cali

 

KDR put in 10w30 last week. Not sure if that changes during the summer months (PA/NJ)

 

Penzoil 20w50 here in Jacksonville, Florida. Although i changed to 10w30 since the weather has been dipping to the 40* mark, and i do most of my driving coming home from work late at night/early morning.

 

Use 25w50 - and those who know avoid Castrol.

 

Ok cool... i wont worry about burning **** up i can now focus on tearing **** up

 

Valvoline 20/50 vr1 racing oil down here....

 

Read your owner's manual... and be happy!

 

Valvoline 20W-50 all year - just let it warm up in the winter

 

Amsoil 20W50....SYNTHETIC....(sic. waiting)

 

i use castrol gtx 20w-50 all year round,....i'm up in Vancouver, Canada

 

What's the deal with 10w-40? What additives and why are they bad for the motor? Why do you recommend staying away from Castrol also? Thanks.

 

I'm running Castrol GTX 10w-40 (Drive Hard) year round. I'm also running Protec-R fuel additive. If someone could please fill me in on the problem with running Castrol I would appreciate it. I'm also curious about this 10w-40 problem. Why is it so much better to run 20w-50?

 

I believe 10w-40 is a mutligrade oil which doesn't burn as well (can't remember correctly, so someone correct me if I'm wrong). If you do a search for "10w-40" you'll find some VERY long threads about oils.

 

Even if it WASN'T cool to use, it' already in there

I usually try to go with Mobil 10-40

 

Hey Mahjik, what's up with your post count? I thought you had a few hundred posts.

 

Yea, a certain admin (that happens to be local to me) has been having a little too much fun over the last few days..

 

Am I the only one that noticed Want2Race's post count? Damn! Over 3,000, and you still don't know which engine oil is cool in your car? Lets pay attention people, come on.

 

10W-40 has a long reputation of being shitty oil. The explanation that I read was that the amount of viscocity enhancers needed to make the 10-40 jump resulted in the oil having other poor qualities. Notice that NO car manufacturers recommend 10W-40 for their recent cars. I don't know if 10W-40 is still ****, but I don't see any reason for me to find out. 10W-30 works great in colder climates and 20W-50 is great for warmer climates.

Other "oil stories" which may or may not be true:

- Pennzoil and Quaker State are **** oils. I've heard lots of bad stories about Pennzoil in particular.

- Castrol may swell seals and does a poor job of reducing engine wear.

- Mazda recommends against synthetics because one synthetic did not burn well in the rotary long ago. People have driven zillions of miles with synthetic in their rotaries since then, and most knowledgeable rotary people feel that synthetic is fine for rotaries. The next question is whether synthetic is worth the extra cost when you change it frequently.

You can get more facts and opinions about oil at http://www.motoroilbible.com/. The stuff I listed in this message is not from reading 'the bible' but I have skimmed through it and it has a lot of other useful info.

-Max

 

I have switched to 5-w50 Castrol Syntec ( I usually ran 20-50 mineral \) for the cold conditions, and my car has never ran better. the engine runs smoother than before and just feels slightly more responsive. along with a smoother pur at idle. anyone else tried 5-W50?