I used castrol GTX 10w40 with the ARX and just wondering since its winter if I should use 10 or 5w30, BTW Im in Texas and have a 350. Also would a regular analysis for blackstone on my ARX cycled oil be enough to determine everything it has done or is there somethign extra I should ask them to test for?
After ARX oil flush
- Thread starter formula94lt1
- Start date