A trip to Wal-Mart this weekend showed me they have Wal-Mart brand full synthetic oil. Here's the 5-quart summary:
ò Mobile 1 Full Synthetic: $19.99
ò Shell Rotella Full Synthetic: $15 (can't quite remember)
ò Supra Tech Full Synthetic: $11.88

The Wal-Mart brand is 59% the price as Mobile one (or 41% cheaper, if you want to look at it that way).

1. Any reason why Mobile 1 is that much better, or even better at all? (I do know Shell Synthetic doesn't use certain agents that Mobile 1 does; for that reason it's safe for motorcycles with wet clutches like my Honda Magna)

2. If "somewhat common standard practice" is to change your oil every 5k with regular oil, how long do you go with synthetic? (I know, everyone is different)

Thanks, wayne

If you [b]currently use[/b] synthetic, which synthetic oil DO you use (or would you switch to) single choice
	Mobile 1 ($20)
	Shell Rotella ($15)
	Wal-Mart Supra-Tech ($11.88)
	Other brand
	I use pure dinosaur (regular oil). Otherwise known as
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