First a small amount of background. I'm in my mid-30's now, and presently I drive deliveries for a living (while building my small business). I think to know where you're coming from you have to know where you've been. The vehicles I've driven influences what you buy in the future and what opinions ...

That might qualify for a 10 step program....or an interVolvtion

Use Blavkstone oil analysis to decide if you want to use 3000,5000, 7500, 10,000 as your oil change interval.

Keep it secret like HIPPA info to conserve internet bamdwidth

ecbskyes, Thanks. Popular opinion touts Mobile 1. It seems to go dark more quickly than this Penzoil with the same viscosities. I use color as the indicator for an oil change. Like many 850's, odometer gear has broken again. I have the battery disconnected too often to use the trip computer. Theref...

smoggyama, I would suggest counting fuel gallons at the pump. Assume some reasonable MPG and calculate estimated miles driven.
volvolugnut

Change it hot and often. I like dino at 3000 miles, shell
v70 98 265k miles. runs prefect, except for occasional loud one lifter click, comes and goes last 100k mile.

I would use syth in winter. for cold flow. syth are getting much cheaper these days. walmart rolltela

My T5 didn’t like the Penzoil syn , with 250k miles. The valve stem seals burned after a hill descent. Switching back to mobil1 or Castrol high mileage synthetic fixed that