CTLAWYER, props for trying to help, but you may have been misinformed. Mixing oil types (synthetic, blend or regular) is not a problem at all. There are some engines that manufacturers recommend use synthetic oil, but even those won’t be contaminated or damaged by mixing in some regular.
If you mix regular into synthetic, you are lowering the level of protection from pure synthetic to somewhere between pure synthetic and pure regular; i.e. you have created a blend. If the synthetic is diluted enough, you may want to drain it and refill with pure regular, but you certainly shouldn’t need to flush the system.
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