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Synthetic Oil Alternative
For any engine 5 years and older I recommend through experience, to use a name brand-name oil and simply add a can of "BG MOA" oil additive. (ask you dealer on the next oil change..cars love this MOA). This product added on every oil change will have the equivalent benefits for the internal engine working... Most people change their oil every 3K-5K anyway so why spend the extra money when a can of MOA costs around $8. You will get the high temperature protection that you get with synthetic. You can purchase this at your local car dealer's servcie center (at oil change time) or at a local gas station(if you're a do-it-yourselfer) People say that the 'engine runs smoother', and 'I get better gas mileage' when switching to synthetic. My own experience, over many years, in using BG MOA in the engine along with using premium fuel (& not the 85/87 octane molatov cocktail stuff)is the same 'engine runs smoother' and 'I get better gas mileage. Same quotes as for the synthetic users so why go to it. Try this alternative.
Note, older engines will leak as soon as you put synthetic oil into them after being on regular oil. A can or 2 of BG MOA may even save that old engine.
I may even start using BG MOA on my new Avalon to really give it a treat. Don't forget also to once a year to use BG 44K in you fuel system. I welcome your questions.