LongGrayLine16
Seasoned Member
- Joined
- Jan 11, 2022
- Messages
- 163
- Location
- Manhattan, KS
- V-Series Cadillac(s)?
- 2023 CT5-V BW (86-027)
So, I am 5 oil changes into nearly 3 years of ownership and just less than 16k miles. I have done oil change analysis reports for each change and probably have enough data at this point to see that the engine and components are generally broken in. On the 5th change (most recent), I also submitted the same sample to SPEEDiagnostix to see if there is any truth to who is the “better” service. Not sure they are worth 2-3x what Blackstone charges.
Does anyone else have any history they would like to share?
Does anyone else have any history they would like to share?



