Reuse Mobil 1 Extended Performance Filter?

[ZeeOSix]

Originally Posted By: Aurora09
Thank you. I will consider extending the drain interval up to or past 5,000 maybe I'll get a used oil analysis done around 4,000 to provide a guideline. I do drive the car pretty hard but I drive gently until everything is warmed up. I'm still having trouble with the concept of running 5W30 year round as I thought 10W30 is supposed to provide better protection in the summer and as I said before I think this 5W30 is burning off more easily due to smelling oil when I ran the defroster the other day.


The hot viscosity of 5w30 is basically the same as 10w30. It's just the cold temperature viscosity that is different - ie, the 5W or 10W part of the rating.

As others have said, 5w30 covers a very large ambient temperature operating range. Not sure what your owner's manual says for oil weight vs. ambient temperatures, but most OMs have that info listed.

 

[teddyboy]

I don't think anybody on the board would argue that 10W30 will cause a problem for your engine, especially not in the summer. It's just not optimal. The 5W30 M1 has a much higher VI than their 10W30 which indicates that the 5W30 is better across a range of temperatures. One thing you might not realize is that even during the summer, the 5W30 is thicker than what you'd want at startup with the 10W30 even more so. The only reason for ever recommending the change to 10W30 in summer was that the viscosity index improvers of the 90s and before sheared easily. Because the 10W30 contained less viscosity index improver, it was the preferred choice when the climate allowed it. Advances in oil technology have diminished the shearing of 5W30, especially in a full syn, making 5W30 the way to go year round now.

 

[Cristobal]

I keep the filter on the car based on mileage, not necessarily oil changes. The Mobil 1 Extended Performance should be able to go for 15,000 miles unless your engine is sludged inside or your environment is VERY dusty. 10,000 at least.