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Why can 0w-40 M1 be run for 10k miles, but as I recall 5w-30 & 10w-30 M1 SS was reccomended to be changed at 7k or less.

Hello Fellow Toyota owner In my '89 4runner 22RE, Im using Castrol GTX 5W-30. It seems to be doing a good job, but it cold weather performance wasnt good. I will probably continue with this or go to Pennzoil.

Rudy, it probably would. But I'm probably not the person that would send in an Oil Analysis. Boxcar- Friction Modifiers lessen friction right? And thats what a gas engine need doesnt it? But I thought that Diesel Engines needed Friction for their Rollers to lift or something.

Ok Great. I'll do M1 SS 5W-30 year round with Toyota Oil Filter, and 7k oil interval. Thanks for the help Guys! -Pont

Patman, but will 10W-30 Give me any benefits over 5W-30? And the other way around? TooSlick, that is a good suggestion. What little difference do you see between the 2 oils? -Pont

Ok, so No Delvac. You guys have made that Clear enough Chances are now that I'm going to go with 5W-30 , but lets hear the reasons for not using 10W-30 in the Warmer Months. Aside from an obvious reason, Gas Mileage. Thanks -Pont.

Was that a Crack at us Italians?

Ah. So I guess if I didnt have to drain the oil all summer and some of fall, that would be a benefit . Is there a Huge Price Difference between the Two? And do you think that D1 could go 15k miles, with a Toyota Filter Change at half that?. Or can I go longer. Very Interesting..... -Pont. PS-...

Ah, I see your Point. So 5w-30 in Winter Definetly. I'm still bothered as to what oil to use in summer though. I could use 5W-30, 5W-40, or 10W-30. What would be the difference between M1 SS 10w-30 and D1? Would one give me better wear numbers than the other? -Pont

Buster, why do you think that 5w-30 would be better in winter than the D1? They are Both 5W when cold right? And when hot, the D1 will be providing more protection. Both are Synthetics. -Pont

So are we ruling out D1 completely? The only reason I ask is that I would Love to have the extra protection in the summer time, as It is very hot and humid here. How about this: 1. Delvac1 Year round. 2. M1 SS 5W-30 year round. 3. M1 SS 5W-30 in Winter, and M1 SS 10W-30 in Summer. Thanks for...

Buster, unfortunatly I am not willing to order oils, Mainly for the convienience of being able to go to the store and pick up an oil, and the Price. I am aware that the D1 is very Shear Stable. What about M1 SS 10w-30 and 5w-30? How well do those oils stay in-grade?

Hey, thanks for the replys guys. I dont think I would run D1 for a year in the car. Thats probably like 23k+ miles. I do however think I could benefit from 5w-40. It does get pretty Hot and Humid here in the summer times. The car doesnt get beat when driven, but it will tow a 4000#(I think) boat...

Delvac 1300S or Delo 400 seems to be a reccomended oil for Muscle Cars, especially Big blocks Ect... I will be running one of the two when my car comes out of storage pretty soon. Who here has Muscle Cars, and What kind? -Pont

I kinda had this Q in the car Oil forum, but noone answered it , oh well. Im plannin on switching to Synthetic at 5k miles in a 4L V6 Toyota 4runner. Although the Manual Says to use a 5w-30 year round, I think that Delvac1 5W-40 would provide better Protection than Mobil1 SuperSyn. I would...

C'mon, I know you people have opinions Is there certain advantages to SS compared to D1. I know that D1 has better additive packages.

What Tan Sedan said about the Winter Driving is basically True, but why waste your time and gas? Just make sure you have an oil that has good Rust and Corrosion Inhibitors before you put it away, fill up gas and add Gas stabelizer. Maybe put the car up on jacks so you dont get flat spots. And...

Anyone Else?

I would Probably use the GTX. But I have heard that it Thins out at around 2500 miles, and that Pennzoil has better cold start property.

Well, the manual says that 10w-30 can be substituted, but 5w-30 should be used again at next oil change. Or something like that. And if I used 10w-30, I guess technically thats going against factory reccomendations. So I might has well be using 5w-40. Thanks for the input so far, Keep it up!