Originally Posted By: mehullica
145,000 miles on a 2003 Camry 2.4L. Has a decent amount of varnish due to short tripping & bargain Firestone/Sears/Midas oil changes it whole life. Which oil will help clean piston ring/ring lands the best, Mobil 1 or Pennzoil Platinum? Car will get driven less now with about 2000 miles a year
Go get any 5W30 (is 5W30 recommended by factory?) that is synthetic, made by Mobil1, PP, Castrol, Valvoline.
Go to Wal Mart, that is where you will find best deal. If there is a lot of varnish, run those oils for like 2K, get them out and then run next batch for 3-5K and keep doing it. Considering 2.4l is seriously not demanding engine, I would run Mobil1 or PP or Valvoline or Castrol (YOU CANNOT MAKE MISTAKE HERE in your case using these oils) full synthetic and keep OCI's at 5K.
Use some better filters like FRAM Ultra (although personally, I would ALWAYS run OEM filter).
Also for these ideas M1 0W40 or Castrol 0W30 (A3/B3 B4) those are first of all, heave oils for your non demanding engine. It will create more resistance and heat.
Do not overthink this.
What I would do?
1. Go to Toyota and get OEM oil filter.
2. Then go to Wal Mart and get Mobil1 5W30 Extended Performance (EP).
3. Run first batch 1K, second 3K and then after that keep 5K OCI.