switching to synthetic???

[davidmmm69]

You being sarcastic? :thumbdwn: Have you searched the forum..

I meant a premium filter. Ones that use synthetic fibers instead of paper media.

Here is Mobil1's site info. http://mobil1.com/USA-English/Motor...ended_Performance_Oil_Filters_FAQs.aspx#FAQs1

Filter rating facts.
http://www.lenntech.com/beta-ratio.htm

seems to be the norm these days...

 

[vdaily89]

What weight oil do you reccommend for a 4.0 OHV engine with 42k miles?

 

[aldive]

What weight oil do you reccommend for a 4.0 OHV engine with 42k miles?

5W30 is most recommended. I personally use Amsoil Series 2000 0W30 ( Dead Link Removed ) in mine with 115k miles.