If Auto-RX cleans engines & synthetic oil "cleans" engines, would my following theory make sense?
Let's use my wife's 97 Expedition as an example. It ran on dino for it's entire life, until I switched to a 6:1 ratio QS semi-syn./MMO mix at 109k. I drained that mix out at 110k, & filled with Havoline synthetic. The next oil change will be at 115k.
So, if synthetic oil has a "cleaning" effect, would it make sense to fill the Expy with dino oil at 115k, for a few thousand miles as a "rinse"? Sort of like the Auto-RX principle? Or is my theory all wet?
Thanks in advance,
wavinwayne
[ May 11, 2005, 03:43 PM: Message edited by: wavinwayne ]
Let's use my wife's 97 Expedition as an example. It ran on dino for it's entire life, until I switched to a 6:1 ratio QS semi-syn./MMO mix at 109k. I drained that mix out at 110k, & filled with Havoline synthetic. The next oil change will be at 115k.
So, if synthetic oil has a "cleaning" effect, would it make sense to fill the Expy with dino oil at 115k, for a few thousand miles as a "rinse"? Sort of like the Auto-RX principle? Or is my theory all wet?
Thanks in advance,
[ May 11, 2005, 03:43 PM: Message edited by: wavinwayne ]