I'm im using top of the line filter and royal purple synthetic on an engine with 3700 miles on it...about how often (miles) should i do and oil n filter change?

 

Every 3000, no matter what oil you use!!

 

I drove about 500 miles in 3 months. I need to change the oil just based on time? 3 months? I never reach the 3000 mile mark in 3 months.

 

I usually go 3,000 to 3,500 with Mobil 1 synthetic & Motorcraft filter.....

 

actually your wrong says this guy...and i read almost the whole thing and all i know is soon im going out and buying amsoil synthetic 10w30 and an amsoil filter(filter rated and guaranteed for 12,500 miles). I'm not changing my oil for at least 10,000 miles. Think im crazy? download this and you'll be amazed. It's in pdf and itz called the motor oil bible
http://www.themotoroilsite.com/forum...e=post&id=1092

 

wtf? Sarcasm indicator is not working properly....

 

why would you ever go that long without changing oil???? changing the oil gets all the crap that comes loose that would damage the inside of your motor. the more often you change it the better, within reason.

 

did you guys even read the article? you'll be surprised at what this guy has to say. He did test on the filters and synthetics and proves the 3,000 mile myth is bull. check it out.

 

I don't care what "that guy" says, because honestly, hes not the one that pays for it when your car goes "hey, stupid, change my oil... blah" and pukes its guts all over the road. There are people on another forum I have been a member of for a few years that run their oil for a YEAR and up to 25,000 miles only to drain it and send it out to be "analyzed". I can analyze year old, 25,000 mile oil. Its black, dirty, and flows like water. Oil breaks down, it gets dirty, you can only get it hot and cool it off so much. I've heard people say skydiving is safe too, but the truth is, only two things fall from the sky, bird****s and dumb****s. I'll stick to every 3k or LESS.

 

Ok, so let me ask you this... how much is a quart of synthetic oil?

We will say 5$ on a good day... So, since I can get Castrol GTX on sale from one place or another for .99 a quart (5X the price), synthetic SHOULD last 15,000 miles compared to standard oils 3,000 miles. Since it doesnt, It makes more sense to me to use a good quality castor oil and keep changing it.

Besides, Oil doesnt just lubricate, it removes microscopic metal fragments, any blowby, and whatever else contaminates your oil. Changing it every 3,000 miles means that this crap is removed every 3,000 miles

Jim