rowekmr wrote:
I used their oil and fuel additive in my 03 Excursion 6.0L that I got with 220K miles because it was smokey at startup. I also switched to synthetic oil and it did help but did not eliminate the cold start issues. After engine was opened up for bulletproofing found out 4 of the 8 injectors were bad so replaced all 8. After that I didn't use Archoil but I did use a store bought fuel additive on each tankful to preserve the injectors and to increase cetane and lubricity after doing some reading. Never had another issue with it up to 250K when I sold it. There are a few before and after youtube videos on people using the stuff. Some think it works other don't. From my experience I did notice an immediate difference.
I was running T6 5w40 and recently switched to Delo LE400 5w40. No complaints so far. I still run AR9100 with each change.
I love my 6.0!
