What synthetic oil are you running?

[p71towny]

I've been running mobile 1 10-30 with mobile 1 filter in anges car since we got it at 130k. She now has 258k.

[Toxicadam]

I use 5w 30 Havoline with Deposit Shield in my '99 Grand Marquis.

[Toxicadam]

I use the big 5 quart jug of Mobil 5000 10w-30 from walmart. $11 bucks for 5 quarts. You cant beat that. It's cheaper, just like Nathan said. I primarily stay away from synthetics in my daily driver, because to me, it's just too expensive, and you may end up pissing your money away.

Modern oils are good enough that it really isn't much need for synthetics with 5k mile change intervals.