I have used Auto-RX full dose to clean out my 1999 Cadillac Seville STS 4.6L V8 55K miles and the wifes 1999 Dodge Grand Caravan 3.3L V6 65K miles.
With both vehicles, fitted a new K&N and changed it out around 750 to 1000 miles. The K&N's had some dirt inside, not enough to overload the filter but still a good amount. Figured the Auto-RX is doing something so let's leave it in. Installed new K&N's for the next 1000 miles. The Dodge K&N is now really clean - nothing at all in there. Nothing! The Cadillac will be getting a new filter in the next week or so and I will wager that its K&N will be super clean.
My conclusion? Both engines were fairly clean to start with. They have been run on M1 or Amsoil full synthetic. The initial Auto-RX miles found some dirt and got it to the filter. Now the engine is so clean the full flow filter is not trapping any new dirt.
This is great news, because I wanted to get the dirt out before installing the Trasko spin on bypass filter.
Anyway, Auto-RX worked for me. Neither of my cars are "sludge monsters" but I feel better having got the dirt out before fitting the Trasko.
The remaining issue is high oil consumption in the Cadillac. After the next oil change I will do an oil consumption check and see if it has improved over 1 qt. / 1000 miles.
Keith.
With both vehicles, fitted a new K&N and changed it out around 750 to 1000 miles. The K&N's had some dirt inside, not enough to overload the filter but still a good amount. Figured the Auto-RX is doing something so let's leave it in. Installed new K&N's for the next 1000 miles. The Dodge K&N is now really clean - nothing at all in there. Nothing! The Cadillac will be getting a new filter in the next week or so and I will wager that its K&N will be super clean.
My conclusion? Both engines were fairly clean to start with. They have been run on M1 or Amsoil full synthetic. The initial Auto-RX miles found some dirt and got it to the filter. Now the engine is so clean the full flow filter is not trapping any new dirt.
This is great news, because I wanted to get the dirt out before installing the Trasko spin on bypass filter.
Anyway, Auto-RX worked for me. Neither of my cars are "sludge monsters" but I feel better having got the dirt out before fitting the Trasko.
The remaining issue is high oil consumption in the Cadillac. After the next oil change I will do an oil consumption check and see if it has improved over 1 qt. / 1000 miles.
Keith.