Well it most likely had oil changes with normal oil.
So why don't you take some 5w-30 oil like Motorcraft, Pennzoil, QS, Valvoline (I think I have most of the colors covered) and a filter and do a 4-5k OCI.
Then see how it did as far as oil useage, how did the engine perform and sound. From there you can alter what oil to use.
I see NO NEED to put in a HM oil in the car if its running fine with normal oil.
Just my thoughts...
No need to put a HM in but no reason NOT too either if that's what you want to do,,M1 has a boosted add pack(being a HM SL oil)better base, help clean things up and could be used year around with extended intervals. What kind of car/engine/service does it see???
What year, make, model, and engine.
Depending on the engine, I would do a short OCI(no more than 3000 miles) with Mobil 1 10W-30 or 10W-40 HM or Valvoline synthetic 10W-30 Maxlife. I would use a Wix filter.
After that , I would use Valvoline 10W-30 or 10W-40 Maxlife blend and a Wix filter.
HM oil is more than just detergents. It has a better 100C cSt, better HTHS, more anti wear agents, more antioxidants, and for sure has seal conditioners.
well I got it to drive in the winter mostly but now Ive decided to spend some money on it and make a nice daily driver but the oil will be changed around 3500 miles and prob. just the plain white purolator filter
Its a 94 Dodge shadow 2.2L
I put a after market Oil pres. gauge and it was running 65 PSI cold on a 80 deg. day
im trying to get the most out of it I can b/c Id like to make it a CS clone on day then swap the engine out for a turbo one.
Well if thats the case run any good dino and she'll be fine. A synthetic at that would be a total waste,unless thats what you want to do??.
I'm with you guys, I'd be running a good 5W30 Dino oil in a 200,000 mile car. YB would be my first choice, or any good SM oil that's on sale. I'd keep the OCI to about 4,000 miles, and decide if a HM oil is needed or a different grade oil based on my 4000 mile OCI results. JMO