im doing a tune up and im wondering what do yall think about 20w-50 oil im not sure which one to use this guy at kragen was like, 5w-30, but my friend was like 20w-50 i dont know...help me!?!?!?

 

2050 in the summer 1030 in the winter

 

i used 20-50w for more of the warmer time . for the winter i like 10-30 or 10 -40 . check the F>A>Q at the top of the forum. it has a a mazda recommended oil chart

 

thanks guys...

 

1040 has been shown to leave bad deposits in the engine, same with 1050. stick with the 1030

 

According to Mazda:

In starting and operating temperatures below 20F, use 5W30
In starting and operating temperatures between 0F and 80F, use 10W30.
In starting and operating temperatures above 30F, use 20W50

Conventional oils 10W40 and 10W50 have been shown to increase deposits in many high reving motors and are generally no longer recommended.

Taken from the FAQ

 

FAQ eh? now THATS smart

 

oh man thanks guys...

 

straight 20-50, I dont drive the car in the winter!!

 

I use Castrol 20w50 all year round. However, I live in Oklahoma and the temps are rarely below 30F for extended periods.

 

There are a couple of people that still use 10W40 and 10W50 claiming that the new formulations and quality checks are better for reduced additives (mostly long chain polymers) that can burn and leave ash and sludge, but I am not convinced.

10W30 in the winter, 20W50 in the summer.

 

Nevermind. I was asking about deposits with 20W-50, I misread that it was an issue with 10W-50.

I run 20W-50 in the summer, 10W-30 in the winter. I think it's time to switch over to my winter oil.

-=Russ=-

 

For the guys living in warmer cali, 20w50 is probably safe to use all year no?

 

Yeah, I rarely see 30F at night. I'm in Fresno, California and thats in the central valley. I think I saw 40 once. I've seen 110 in the summer, and this summer had high 90s and 100s throughout. I never actually tried 20w50 before, but I am going to when my Turbo II starts running. My old 91 NA took 10w50. We are still getting mid to high 80s here btw. At least its not humid like the summer. lol. Nights are like high-50s to mid 60s.

 

I'm in Sacramento, CA and use 20w50 year round as well. Our temps are pretty much never low enough to justify switching over to 10w30.

Zach

 

10w30 year round bay area, CA

 

The biggest reason for switching to 10w-30 is starting the engine in the cold. 20w-50 turns more or less solid below zero.

-=Russ=-

 

Covered in the FAQ for FC sticky thread at the top of the 2nd gen RX-7 technical section.

thread closed