I disagree completely. It is more important to get oil flowing to the parts that need it more quickly. One should also never push a car hard in atleast the first three minutes anyway during warmup and circulation time. I completely disagree with your theory about 0w30 vs. 5w30..... I had a saab 9-3 with turbo that went 220,000 mile on the same turbo without failure before selling it to the neighbors kid. I did change oil in it every 5000 religiously and did wait 1.5-2 minutes prior to shutting the car down most of the time for the turbo, but there is not one thing wrong with 0w30. It flows more quickly, coats quicker, and then thickens within a matter of minutes. The only difference between the two are one in a sense is more elastic. Different fillers and molecular structure to an extent. Picture this: A tightly coiled spring and a straight paperclip. The 0w30 molecular structure is the tightly coiled springs. As the molecules of the 0w30 heat, they elongate per say, and the viscosity changes to that of 30w. The molecules of a straight 30w would not have this characteristic as they are already elongated. A 10w30 would not have as much elastisity per say or abilty to elongate and change, therefor the smaller number difference. Straight 30w has no real ability to elongate molecular structure and change viscosity. What really breaks down first is the oils ability to change and elongate. All reputable high grade synthetic oils today really dont have a problem for the first 5,000 miles. The ability for the oil to change its viscosity begins to narrow. If you are hard pressing your car, have a turbo, extremely hot temp driving, etc, consider a change between 5000-7500. Otherwise 10,000 is a good max ballpark with a good synthetic fiber filter.

Remember, a magnetic drainplug is always a great idea no matter what the case.

Guys, I only swear by Amsoil because I have been using it for so long and have seen it first hand. I am sure that most all top notch Synthetics are very similar.

AMSOIL - Synthetic Oil, Motor and Engine Oil, Lubricants, Air Filters, Oil Filters and Greases


I run:
0W30 Signature Series Synthetic
Filter = EAo34 even though it calls for a 57. Slightly larger, more filter media...

...and that is the ful story behind whats going on with viscosity, why and how it changes...