I just got done changing my oil to royal purple and I have to say that it is worth the extra money..My engine runs smoother and It surprisingly pulls harder!...I also got a K&N oil filter

 

I just bought some mobil 1 and its going in tommorrow afternoon. As well as an OEM Motorcraft filter. I'm a cheapo, but hey, if it's OEM it can't be too bad. Plus I forked over enough for the Mobil 1.

Every time I've changed my oil I can feel it run smoother. I noticed a larger difference when I installed synth blend last time, and now I'm going top of the line full synthetic.

 

royals good but pricey ,synech or mobile 1 full syntethic works good

 

I notice that "fresh feeling" right after I change my oil too (Mobil 1 every time, thinking about Royal Purple...) but it doesn't last. I'm not about to drop the coin to change my oil every 1000 miles either.

 

what you mean it doesnt last and having to change your oil ever 1000 wich oil is that

 

Like he said. If you are changing your synthetic oil every 1000 miles, then you are a waster of good oil.

 

john, what I mean is that period right after the oil change where the engine runs noticeably smoother and quieter and seems to also run stronger only lasts about 1000 miles or so. After that it kind of starts to feel a little rough again, but like baddog said, the oil is still plenty good after that. I use Mobil 1 and change every 5000 miles. Some people say that Mobil 1 or other synthetics are fine for longer intervals, but every tech I've ever known has said, "No more than 5000 miles, I don't care what Mercedes/BMW/Volkswagen says."

 

It says that normal oillasts 3000 miles and this one 12000 miles!

 

I've brought that up to every tech I've ever known, and none of them recommended going that long between oil changes. The foreman for the Mercedes shop I used to work in, a tech with 23 years of experience, said he still changed the oil in every single one of his vehicles every 3000 miles whether they ran synthetic oil or not. If you run regular oil, 3000, if you run synthetic, 5000. You are probably good for a little longer, but I don't push it.

 

well the thing most people get wrong is that oil never breaks down its the addatives in the oil that break down andgo bad ot the oil gets contaminated