15k service coming up need advice

my 15k is coming up, I'm thinking about switching from conventional and going royal purple in everything, engine, diffs, does anyone here use this or recomend anything different?

 

I used royal purple engine oil in a G35 I had. It was great stuff, no doubt about it. I can't justify the price of it though for the tacoma. I just use mobil1 w/ an oem filter.

Can't help with the diffs or anything else though.

 

i am running Mobil1 in my tranny, rear diff, & in my engine w/ OEM oil filter. My engine runs great with it. You can run RP in your truck, run whatever you perfer. I've read people using Lucas oil, RP, Amsoil, or Mobil1.