To begin with, I should say that I've never been a fan of oil additives, whether they're claimed to clean the engine, prolong its life, make it run better, increase hp and/or mpg, or whatever. In my opinion, oil treatments are snake oil.
In addition, since joining this board, and doing a lot of Google research independent of what I've read on this board, I've come to the conclusion, from the research and from what's been said on this board, that synthetic oil will keep your engine clean, unlike dino oil, and that you can even switch from dino to syn and the syn oil will clean any deposits caused by the dino oil.
I've so far resisted the urge to use Auto-Rx because of what I've said above. My question is this: If syn oil will keep your engine clean, and (at least eventually) clean an engine that's been run on dino oil, then why use Auto-Rx?
I drive an 03 Ford Ranger that I switched to synthetic oil at 9,000 miles and my wife drives an 03 Subaru Forester that I switched to synthetic oil at 26,000 miles. The Ranger is on its second 10,000 mile run of Mobil 1 and the Forester had a 10,000 mile run of Mobil 1 and then I put Mobil 1 EP in it. From now on I'm going to run Mobil 1 EP in both for 10,000 mile OCI's. I use a Pure One oil filter in the Ranger and a Napa Gold oil filter in the Subaru. I change my own oil and oil filters.
In addition, since joining this board, and doing a lot of Google research independent of what I've read on this board, I've come to the conclusion, from the research and from what's been said on this board, that synthetic oil will keep your engine clean, unlike dino oil, and that you can even switch from dino to syn and the syn oil will clean any deposits caused by the dino oil.
I've so far resisted the urge to use Auto-Rx because of what I've said above. My question is this: If syn oil will keep your engine clean, and (at least eventually) clean an engine that's been run on dino oil, then why use Auto-Rx?
I drive an 03 Ford Ranger that I switched to synthetic oil at 9,000 miles and my wife drives an 03 Subaru Forester that I switched to synthetic oil at 26,000 miles. The Ranger is on its second 10,000 mile run of Mobil 1 and the Forester had a 10,000 mile run of Mobil 1 and then I put Mobil 1 EP in it. From now on I'm going to run Mobil 1 EP in both for 10,000 mile OCI's. I use a Pure One oil filter in the Ranger and a Napa Gold oil filter in the Subaru. I change my own oil and oil filters.