What happens if...

[5zigen]

You switch directly from fossil oil to synethetic, without doing any preparations beforehand (gumout flush or running detergent oil) first?

Also, I plan on giving my car Valvoline Maxlife oil before switching to synthetic. How long should I run the oil before flushing it out and adding full synthetic Mobil 1 oil?

BTW my car is a 1997 Q45 with 98xxx miles, I live in California in the Bay Area, so what kind of oil viscocity would the wise people at Nico advise?

Thank you.

[Falkdesigns]

Amsoil is #1, Redline is #2, Mobil1 is #3 in terms of tests results. I have used Amsoil and currently Redline. No experience w/ Mobil1, but it seems that due to the availability, most on here use that.

Run 5w30. You shouldn't have any problems w/o a flush, but the benefits will be less.

[elwesso]

I dont see why it would matter either way if the engine is clean.....

Might as well just toss in a can of BG quick clean, only $6.....

[5zigen]

Amsoil is #1, Redline is #2, Mobil1 is #3 in terms of tests results. I have used Amsoil and currently Redline. No experience w/ Mobil1, but it seems that due to the availability, most on here use that.

Run 5w30. You shouldn't have any problems w/o a flush, but the benefits will be less.

Does anyone else have any feedback on Amsoil and Redline oils? I'm open to any of those three, and I want the best I can get, price does not relaly matter.

[Falkdesigns]

If you just research oil comparisons on the web, you will find that all charts seem similar. On Redline's own site, they don't show Amsoil becuase it surpasses them, but they are over Mobil1. On Amsoils site, it shows the order I listed (which are resulsts from an indepentent lab, not thier own lab), and other independent sites show the same. If Mobil1 has charts, I guarantee they don't include Amsoil or Redline (100% syn's).

I've read many different pages of oil comparisons, and basically, everyone considers Amsoil to be the best there is, but it's the fact that you can get Mobil 1 anywhere, and it has millions of advertising dollars that make it more popular. Still, for my money I will always use Amsoil, but as I get Redline free, I'm useing it now, and I'll just change it more often.

[maxnix]

Search for previous threads with some very detailed discussion and great links. Particualarly posts by palmerwmd, Q45tech and texasoil.

[qship96]

I have used mobil 1 for the first 100,000 miles in the q at 5,000 mile changes-then switched to Redline at 5-6000 mile changes{90 days or less-always} and am now at 158,000 miles with zero oil consumption and zero smoke from the tailpipes.oil remains a light brown color at changeout.I think Mobil 1 is an excellent oil for the q,but switched to Redline due to it being a group 5 ester based oil that has a very strong detergent characteristic,and is blended for high performance,hard driven applications.I dont think Amsoil is superior to either of these oils,its claim to fame is long drain intervals,up to 1 year 25,000 miles-something I have no interest in.

[Jesda]

Depends on the application I guess. You can run a dino oil with no negative effects if you keep the intervals short (2500-3000 mi).

If youre using a crappy Fram filter, it doesn't matter how good your oil is.

I used to do Mobil 1 religiously, but right now I'm using a Quaker State 4x4 synthetic blend. Some extra detergents for half the price. $15 goes a long way when you're saving money to replace under-plenum hoses.

[CJQ45]

Ohhhhhhhhh shiiiiii$%%^^ I;m using a Fram filter... what does that mean - no good??!!

Whats the best filter to use. I'm running quaker state syn. blend as well - but with a Fram filter - whats the best one to use other than OEM.

[5zigen]

Ohhhhhhhhh shiiiiii$%%^^ I;m using a Fram filter... what does that mean - no good??!!

Whats the best filter to use. I'm running quaker state syn. blend as well - but with a Fram filter - whats the best one to use other than OEM.

Mobil 1! Get them at http://www.everythinginfiniti.com for a discounted price.

[Q45tech]

Now that the Q has passed 280k [282k] just went from 10w30 Valvoline [used since 265k] to 10w40 Valvoline but the thing I noticed is [after 220k of synthetics] is how much conventional oil evaporates [the light molecules].

15% evaporation [via PCV system] [in 6 quarts] ~~a quart in 4,000 miles vs less than half that with synthetics.

"The Noack Volatility Test has long been a specification test for European motor oils. With the advent of ILSAC (International Lubricants Standardization and Approval Committee) and its GF-series specifications, this volatility test first entered United States test specs in 1992, becoming a requirement for North American motor oils when API SH/ILSAC GF-1 oils were introduced. In 1996, volatility limits tightened to 22% with GF-2 oils’ entrance on the market, then were again lowered in 2001 – this time for all grades – to 15% (or 13% for European synthetic motor oils) with GF-3 oils’ introduction."

http://www.paclp.com/profile/r...B.htm

[Q45tech]

However no big thing to just keep a quart around and add 1/2 at 2,000 miles and the other half at 3,000 miles and change at 4,000 miles [every 6 weeks]. Fresh additives.

Maybe the 10w40 Max will be a little better, we'll know in 6 weeks

[metaverse3]

The rule of thumb for Amsoil is it can be used without engine prep since it actually works like a detergent. For the first oil change after starting with amsoil, make it a low mileage one..500-1000 miles. The color of oil that will come out is basically the amsoil washing out the engine block. After that, go to intervals that you are comfortable with. I run amsoil for 5500-6000 miles on my maxima. Oil comes out clean with a standard WIX filter which also looks good. Zero issues with the car and a very noticeable increase of power...

[Falkdesigns]

Ok, theres a post by someone other than me, that everyone trusts the opinion of, Qtech. As everyone can see, Amsoil SMASHES the competition. Their claim to fame isn't just extended OCI's, but their superior product, plain and simple. I'll continue to use Redline as long as I can keep getting it for free. After that, I'll be right back to Amsoil. And for filters, I'll continue to pay 12-14 for an Amsoil filter.

[5zigen]

Is it okay to use a Mobil1 oil filter with non-Mobil1 brand oils?

[elwesso]

Perfectly acceptable.....

There are other very good filters, just dont use the ORANGE DEATH.. THe supertech (walmart brand) filters are great filters for the money!

[AZhitman]

My Q has had Mobil 1 and OEM filters since it had 300 miles on it, changed every 3000-4600 miles (mostly 3000, some 3500 and only 2 times over 4000).

When i had the heads pulled for a faulty exh valve in 2003 (100K miles), cam lobes mic'ed out AS NEW and you could still see the cross-hatching on the inside of the cylinders. Literally NO wear.

The rest of the car may eventually fall apart, but it doesn't use a drop of oil and the engine is still strong.

[maxnix]

The rest of the car may eventually fall apart, but it doesn't use a drop of oil and the engine is still strong.

Then we will all be drivning around in 29 Ford rods powered by our VH45DE.

Screw Coddington.

[Falkdesigns]

Greg, I guarantee that if you had doubled the OCI's the results would have been the same.

[5zigen]

I also plan to add a full can of BG MOA with the oil... what do you guys think of this stuff? What are the dis/advantages?

[elwesso]

Its good stuff..... About the only oil additive recommended here...