what motor oil

[Red Devil]

For Spring and fall I use either Amsoil or RP 10w40. I don't drive it unless it's "warm" out in the winter so I usually stay 10w40 in that instance. During the summer I use 20w50 Amsoil or RP.

[240sxHitman]

one more question for ya Ian

I'm gonna be doing my oil change in a few days and I wanna try Amsoil out. On the website theres 10w40 xl(extended life) synthetic oil and 10w40 Synthetic Premium Protection Motor Oil which one would be best to use?

This is on a stock SR

[IanS]

one more question for ya Ian

I'm gonna be doing my oil change in a few days and I wanna try Amsoil out. On the website theres 10w40 xl(extended life) synthetic oil and 10w40 Synthetic Premium Protection Motor Oil which one would be best to use?

This is on a stock SR

Ive run the premium protection 10w40 in my redtop for near 100,000 miles now.

When I put my new oil pickup in last week, I got pictures of my oil.

[240sxHitman]

cool, thanks for the feedback

[Triperformance]

How you drive, and location (climate) are big factors, but every engine is different, and some do require thicker oils.

For normal American air breathers, whatever the local tire shop is pumping is good enough. They rarely push their cars hard enough for it to make any lick of difference, and they will junk the car long before the engine starts knocking.

For guys like us it becomes of much greater importance, and as more modifications are added, everything compounds. The more power an engine produces, the more strain is placed on the oil.

I'm not saying your wrong, I'm just saying that you cant classify the majority of this forums users, and the soccer moms at your dealership together. The "if its good enough for them it should be good enough for you" mantra just doesn't work in this situation.

Your Information is basically what I'm preaching.....Have you built any performance engines? Imo the statement about soccer moms and relating to the dealer I work at was an example and was uncalled for as you stated it as if I don't know what I'm talking about.

The point of that example was the climate I live in is the same as to which the oil difference doesnt matter.

Let me try this again, follow the FSM on weight choice....If you want to one up it find oils that have more additives that address your cause(also stated...but they are found on the bottles with information listed...most are shaped like stickers), thats why theres so many different types/brands and such. I'm not a fan of Royal Purple....but castrol I would go with personally. Also the majority of the spectrum on the FSM chart would suit the 10W-40 as stated. I'm also not a fan of specific full synthetics, I think its just an overly expensive oil. Nissans I'm still new to but I will be sticking with what I know....and thats synthetic blends since most blends are just about the same at synthetics on the market.