yeah! every oil change ive done on every engine since my first time back in 1994 the oil would be black after a few days.... you cant flush it all out and the left over oil takes the color over quickly and i use the 15k mobile one and never change the oil in less than 10k... and I finally used forscan and changed my cluster notification to 10k so no more constant resets until im ready
back like 4 years ago I did an oil change on my GF's trailblazer 7qts of amsoil pretty sucky..... 7 x $12.99 then less than a week later she had a wheel bearing changed at a shop and they told her that her oil was over due and showed her a black dip stick and she let them do a drain and fill with regular dinosaur oil... I was floored that 1. she fell for the black oil lie 2. she thought I lied to her about doing a $100 oil change 3. she paid them $1300 for $150 worth of work and got pissed at me for *****ing out the shop that ripped her off
A fresh oil change in my Suburban will turn black in the first 50 miles, but then it's a diesel so expected. Ford makes really good quality fluids for their vehicles but I've always thought syn-blend oil is kind of a waste. It is usually priced closer to full synthetic than conventional and going full synthetic doesn't cost much more. Even if I continue using M1 Ill probably stay with 3k to 4k OCI. From what I have read here about the 4.0 engine, frequent oil changes is the key to long engine life and avoiding issues with the timing cassetts. We don't put many miles on our vehicles so 1 to 2 oil changes a year is pretty cheap for what I will likely get in return. IMO
Mazda mechanic