Castrol that dealer uses... I rather replace every 3750 than go synthetic and get 7500+ out of it. Way I see it is old synthetic oil can't be better than new Dino oil w/ frequent replacement.

 

Unless you are using your car for a taxi, towing a lot, or driving mostly dirt roads, you'd be fine going well past 3750 on the Castrol dino oil; at least 5000 and perhaps even 7500 are doable and will maintain your warranty just fine. But I agree, there is virtually no difference you will receive from using synthetic over more frequent dino oil changes. I think if you do the math though, you'll see that synthetics aren't twice the cost though, so more frequent changes actually cost more and require more effort than using synthetic.

 

^idk if id go that long on dino

* i take it back the owners manual actually does state for schedule 2 owners can replace oil intervals at 7.5k intervals. lol never saw that i usually jus change at 5k. always have

 

Funny thing is my stealership contact told me the same thing... and when he told me I thought he was talking out of his ***... after all, this douche was the same one who told me I had a bad tranny after 30k from a noise being made by a belt and pulley ... that even I knew wasn't the tranny lol


Still, good to know when I go over 4k I'm not necessarily killing my engine

 

Of course I say all this, but I'm also a guy who uses synthetic and changes it it every 8K miles or so. However, in my own defense, I do it knowing full well that it's not necessary. I will never realize any appreciable difference (vs dino oil at 7.5k intervals) during the duration of my ownership of the car, or even the useable lifespan of the car overall; it just makes me feel good is all.

 

I use Mobil 1 and change every 5k.

 

5k on synthetic? Isn't that bit of an overkill??? How much per change?

 

About $34 and about every 2 months.

 

Im also using mobil 1 and changing at 5k intervals. I change it myself so its <$30 for oil and $10 for oil filter. The car drives a lot better and smoother with fresh oil, I'm also pretty sure it keeps my mpg steady.

 

Amsoil 5w30 full synthetic signiture series

 

Guy, you do realize that this practice makes NO SENSE at all, other than to make you feel good, don't you?

 

Idk why you guys would go 5 k miles on mobile 1

 

Have you guys ran it on the dyno before and after an oil change? I have.....

 

:clap:

 

5k on Synthetic without an UOA to show how the oil is holding up is a perfectly safe practice.

No idea what you have in mind.