Oil Change

[DTAILS]

Keep in mind this is my opinion, and is oriented towards stock vehicles by no means am I saying that it is a negative effect to an engine using synthetics. I do believe your BMW does run a bit cooler do to it being highly modified with a tighter engine. Probably not something a stock motor would reflect though.


I have been in heavy construction for 26 years, and have seen my share of pickups, and equipment that get extreme duty. Pickups are usually always loaded above rating from day 1 brand new do to tooling of the trade. usually pulling heavy loads, and get neglected in the maintenance dept.

I have seen motors go to hell that have been faithfull maintained, and I have seen the neglected with out problems beyond belief. So for me its a proving ground. I do put high milage oil in my daughters cars do to the fact they forget to check the oil change milage, and they are not always around when I think of it, but they are getting better at it.

No worries.

Different experiences = different opinions

I tend to track the BMW here & there so cooler by just 5 degrees matters. The 4Runner was taken on a 6500 mile road trip last summer and was changed to RP before leaving mainly because I'm a believer. High mileage and my somewhat abusive handling of the truck just reinforced my beliefs with the outstanding performance it continues to show me.

I should probably treat it a bit better, but then it might actually breakdown on me just to make a point.

 

[CLMT]

Ok, Thank you for your help. I will think about switching form M1 to RP, I will keep investigating.

Is there any differerence between M1 10W-30 full Synt. and M1 5W-30 Synt. Truck & SUV?

One of my friends recommended me to use M1 5W-30 Truck & SUV.

Thanks.

 

[Frankhenrylee]

I have heard that you are not supposed to change from conventional to synthetic on higher mileage vehicles. I thought if you wanted to run syn that you needed to start that very early on. Can anyone out there speak knowledgebly about this old rumor?

 

[CLMT]

I have heard that you are not supposed to change from conventional to synthetic on higher mileage vehicles. I thought if you wanted to run syn that you needed to start that very early on. Can anyone out there speak knowledgebly about this old rumor?

That's true, but it was a long time ago when the syntetic oils were not compatible with some ruber seals. But, nowadays the majority of the synthetic oils are compatible even with conventional oils.

 

[TailHook]

I have heard that you are not supposed to change from conventional to synthetic on higher mileage vehicles. I thought if you wanted to run syn that you needed to start that very early on. Can anyone out there speak knowledgebly about this old rumor?

That's a just rumor that has been debunked to death, so I won't even try...as long as you don't have any current leaks, you're good to go.

I have had experience with converting to synthetic with a '91 Suburban 2500 with 150K and the wife's former '04 Z71 Suburban at 110K and had zero issues. The Denali was fully converted (ALL fluids) at 50K...

 

[DTAILS]

Ok, Thank you for your help. I will think about switching form M1 to RP, I will keep investigating.

Is there any differerence between M1 10W-30 full Synt. and M1 5W-30 Synt. Truck & SUV?

One of my friends recommended me to use M1 5W-30 Truck & SUV.

Thanks.

Other than the obvious difference in weight ...........

Here's the info:
Mobil 1 FAQs