If you live where there is cold weather in winter and your car sets outside syn is for you also.

I'm glad this was brought up.

I recently purchased a 2011 F150. I've always changed the oil in every vehicle I've ever owned every 3-4k miles but I'm at 3000 now and the truck's computer is telling me it's "oil life" is still at 75%. Should I listen to it or change the oil anyway? According to the manual I should base oil changes on the system info (computers) recommendation. I know for a fact it has regular oil in it, not synthetic.

Seriously? How?

If I had a leak, I wouldn't use synthetic because of the higher price.

You can do 5000 on conventional.

Heh. Pretty much

Listen to your vehicle.

Because it's better oil and will squeeze through gaps more readily than conventional oil. You don't always know you have a leak. When I began running synthetic, a leak that might leave a drip on my driveway every two days turned into a gusher.

I use Mobile 1 synthetic and Mobile 1 filters. Best I could find via research and word of mechanic mouth. Never any problems and engine purrs like a kitten.

Thanks guys ... hadn't realized this.

I believe synthetic is more expensive ... Correct??? If so how does that play into the mix?

I change mine ever 5K ... coz almost all my miles are on the interstate.

It is, but since most people change synthetic oil every 10k, the added cost is nil.

This. I like Mobile 1.

Ah, that makes sense.

fully synthetic ....changed every 5K miles. easier to keep track that way....105k, 110k etc.

You're just wasting money. May as well use conventional. What is so difficult about remembering to do it every 10k? 110k, 120k, 130k...

I take my 07 Silverado with 85K mi and my 03 Suburban with 218k mi to Firestone and they get the Kendall Synthetic Blend around 4k mi

The 03 Saab 9-3 gets Ful Synth Mobil 1 around 9-10k