Synthetic Oil

[07WYarisRS]

Don't worry about the color of the oil.
Most color is caused by particles in the oil too fine for the regular style filters to trap. If you were to use an Amsoil by pass filter and the 2 micron oil filter set up you oil would still look good even after 100,000 miles.
Synthetic will tend to get dirty faster on enegine that were run on dino oils as they clean away deposits that have built up over time and prevent new deposit build ups.
That's why the sooner you can switch the better.

As for the royal purple VS amsoil question
Both are decent oils, However I have personally seen the lab results from a couple of royal purple tests and they showed serious issues with their quality control. In one case the oil grade on the bottle was higher then the actual oil in the bottle. I've also seen high levels of copper and water.
Amsoil and Redline IMO are two of the best lubricants out there.

Asfor the roatary engines, That does hold some truth
But I would not worry about running Amsoil in An RX7 or -8.
Poorly refined caster oils (bean oils) do form heavy gummy deposits when exposed to flame and severe heat and this will build up over time.
Amsoil or redline oils do not form any such depostis.
I have seen some of my engines with hundreds of hours on them and ZERO carbon, ZERO build up anywhere on the combustion chambers or pistons.

[w1ngzer0]

Not sure this will help, but one of our admin's is a chemist. He analysed a lot of the oils. there is the link to the thread. Talks about reducing lifter noise and other things.

http://forums.nicoclub.com/zerothread/6610

[Yaris Dick]

Originally Posted by w1ngzer0

Not sure this will help, but one of our admin's is a chemist. He analysed a lot of the oils. there is the link to the thread. Talks about reducing lifter noise and other things.

http://forums.nicoclub.com/zerothread/6610

02 data. 06 updated debate with no facts. Won't help.

[w1ngzer0]

Originally Posted by Yaris Dick

02 data. 06 updated debate with no facts. Won't help.

meh, oh well.

[dandj]

I did the change to amsoil 5-30 this weekend. My auterra showed about a 8% increase in gas mileage but will have to fill up a couple of times before I'll know for sure. (getting just under 39 mpg now)

[ItsMyDaily]

Originally Posted by dandj

I did the change to amsoil 5-30 this weekend. My auterra showed about a 8% increase in gas mileage but will have to fill up a couple of times before I'll know for sure. (getting just under 39 mpg now)

auterra?

[Violin]

I got 187,000 miles on my 1987 turbo RX-7 using Mobil One.

[foober]

Originally Posted by Violin

I got 187,000 miles on my 1987 turbo RX-7 using Mobil One.

I've got 170,00 already on my 93 nissan truck. And its still running perfect. And I only used mobil 1 in it.

I switched to amsoil with my yaris. Even got the amsoil oil filter. And guess what. I am getting better gas milage. Its got to be about 5 more miles a gallon so far. I was pretty suprised.

[Racer X-8]

Originally Posted by Violin

I got 187,000 miles on my 1987 turbo RX-7 using Mobil One.

Wow, I know you're doing real good if you get 100k miles on a twin turbo FD, isn't it about the same for yours?

[nsmitchell]

I used Mobil-1 for years on my Odyssey and my old 1993 Del Sol Si. Both engines are/were in perfect running condition. My Del sol had 60K miles when I sold it about 2 years ago and it ran just as smooth as can be, and I beat that thing like a redheaded stepchild everywhere I went. My Odyssey now has Amsoil Series 2000 0W-30. I switched it over from Mobil-1 0W-20 about 5 months ago, and it still runs perfectly and has 60K miles on it.
BTW- The Odyssey's tranny blew up at about 30K miles. Honda replaced it and it is running like a new car. That thing is fast too. Beats many a "sports car" easily. Beats the crap out of Ford trucks with V8s. hehe

[Racer X-8]

It really IS easy to change the oil, I did it once so far. I use one of those big round black plastic oil collection pans with a side spout to pour it out at the recycling tank. A lot of words there, I hope you can figure out what I'm talking about. So anyway, I had to jack it up some to get that thing under there. If I'd have used a flatter pan, I might could have done it without jacking it up at all. The nasty part was all the oil that came out once the seal was broken at the filter. Man, it gushed badly. Luckily, that big ole thingie I described earlier was big enuf to still be catching the drip-drip-dripping at the drain plug hole AND be slid over far enuf to catch that massive discharge of oil in the filter removal zone. hehe nasty, but I caught every friggin drip and it was easy to wipe-off everything spotless spic'n'span with a paper towel.

What does this have to do with synthetic oil? Shucks, dunno. ummmm......

[Black Yaris]

good thing I work at a shop, only cost me 10 bux to change my oil..... well I have one of my guys do it... they pay me too much to get dirty... but I do plan on switching to synthetic oil, probibly moblile one, because that is what we stock at work, and I will still change my oil every 5,000 miles.... why do you say? because synthetic is better for your engine, plain and simple

[static808]

thanks for all of the great information everyone. because of this thread, im getting some amsoil next week to put in our 1 month old sienna (cracked 1k just this week). however, i was wondering how exactly does the amsoil engine flush work?? i read the how-to on the amsoil website, and it looks like you have to use two new oil filters in order to complete the process. if anyone has a "dummy's" guide on how to perform this operation, i'd greatly appreciate it!

--B

[nsmitchell]

Originally Posted by static808

thanks for all of the great information everyone. because of this thread, im getting some amsoil next week to put in our 1 month old sienna (cracked 1k just this week). however, i was wondering how exactly does the amsoil engine flush work?? i read the how-to on the amsoil website, and it looks like you have to use two new oil filters in order to complete the process. if anyone has a "dummy's" guide on how to perform this operation, i'd greatly appreciate it!

--B

That is strange... I guess Amsoil wants maximum flow from your fresh oil filter to trap the avalanche of dirt that will be headed its way, since a dirty filter would be already saturated with filth. Then you drain and put on a good oil filter, like theirs, and filler up with luscious synthetic oil!
I will be doing an Amsoil flush to my Odyssey on my next oil change. I changed from Mobil-1 to Amsoil about 6 months ago and the oil is already pretty dark. I think Amsoil is suspending alot more dirt that Mobil-1 wasn't picking up. I must say my 02 Odyssey with 60K drives like a new car still. I mean just as smooth as silk... you barely know it's running. And it's fast. Just spanked a Jeep 4.0L HO last night and we had my family and about 100lbs of pumpkins in the back. Didn't get over 50 MPH though for those of you concerned about drag racing with my family in the car. That kid was pissed because he had his 2 friends in his Jeep! What a blast!

[Black Yaris]

You are basicly doing 2 oil changes back to back

[dandj]

I have been slightly dissapointed as I LOST SOME GAS MILEAGE WITH AMSOIL. It could be slightly colder weather but I doubt it. I dropped from 39 mpg to 38 to 36 mpg and the harmonic vibration seems worse. I do believe in synthetics but I was hoping for a slight improvment.

[07WYarisRS]

Originally Posted by dandj

I have been slightly dissapointed as I LOST SOME GAS MILEAGE WITH AMSOIL. It could be slightly colder weather but I doubt it. I dropped from 39 mpg to 38 to 36 mpg and the harmonic vibration seems worse. I do believe in synthetics but I was hoping for a slight improvment.

Colder weather will make the mileage a lot worse.

[Racer X-8]

Originally Posted by 07WYarisRS

Colder weather will make the mileage a lot worse.

Well, maybe up where you guys are. Down here in SC - no. I just now did some averaging to try to quantify this.

I own an Infiniti G20T. I've been keeping meticulous mpg logging ever since we bought it 6-28-00. So far, that's 283 fill-ups. My excel file calculates mpg for every fill-up. I just now averaged those mpg's for the winter period - the beginning of December thru the end of March. Then, I averaged those 6 averages. That averaged average for winter periods (december - march) was 0.1 mpg different from the overall average.

I guess, at least down here, it balances-out. The bad efficiency during warm-up is offset by the improved efficiency (when the engine has warmed-up) that you get with the cold, more dense air.