Lots of different comments on oil weights...I can't decide.

[GaryR]

Originally Posted by turboflyer

I have used 0-40 since new, now a 74K, and does not use oil and runs grreat. Also all oil analysis results have been outstanding. I have decide to supplement the 0-40 with two quarts of 10-40 Mobile one motorcycle oil, just as a booster. Not really needed though. change it once a year or 7,500 and you will be fine. Oil threads can get real personal.

In what car, nothing in your signature..

[turboflyer]

It is an 01 Boxster S. I hate signatures. Especially the ones where people feel the need to list ever stupid option their car has.

[GaryR]

I only wonder now if your little Boxster will fit there..

[K. McClain]

For those of you thinking about using Red Line 5W40, I think the best price is found at Racer Parts Wholesale .

Motor Oils - Red Line 5W40 Motor Oil

[Crispy]

I thought the issue with the 0w40 vs. 5w40 M1 was more about the additive package with the 5w40 having the older SL rating with more phosphorus and zinc. The newer SM rated oils are "greener". That's another reason the Castrol Syntec 5w40 with the SL rating looks good. I seem to see it more readily available than the 5w40 M1.... C.

[turboflyer]

Originally Posted by GaryR

I only wonder now if your little Boxster will fit there..

List away. Some folks feel the need to compensate for many reasons. Note sure what yours may be. You did not list the color stitching option for you car. Must be hard holding back that much.

[GaryR]

Originally Posted by turboflyer

List away. Some folks feel the need to compensate for many reasons. Note sure what yours may be. You did not list the color stitching option for you car. Must be hard holding back that much.

Well then.. At 1st I thought maybe you didn't intend on tossing that shot about signatures (which I took to be at me) when all I was trying to do was help you and I misunderstood and reacted badly. My signature has a description of the options on my project because so many people wanted to know the details. But reading this last response it's apparent you did direct the insult in my direction (and of course at many here with lengthy signatures). Good luck from this point on, I think my reputation here is that I try and help people but in your case i'll just wish you well...

[BYprodriver]

Originally Posted by JMatta

Since this post started over one year ago, I must modify my choice of oil. Though I feel Royal Purple is still a very good choice, I'm now on my third fill of Castrol Syntec 10W40, based upon input from some very knowledgeable folks. The engine continues to run smoothly, while I still freshen the crankcase every 3000 miles, at most.

Castrol Syntec 10W40 is my new oil of choice here in So.CA for my new engine. It seems to me factory 0wt recommendations help raise EPA MPG & CAFE ratings.

[Paul Stewart]

Most will agree that most engine wear occurs at startup. 0W should provide lubrication quicker than any weight above it.

My 01 has has 84,000 miles all on 12-15 month M1 0W-40 oil changes and has never used any oil. Blackstone oil analysis results have been fine.

[mattatk]

Has anyone used Shell Helix 5W-40? Checked with Shell & ZDDP levels 1228ppm.

[turboflyer]

Originally Posted by GaryR

Well then.. At 1st I thought maybe you didn't intend on tossing that shot about signatures (which I took to be at me) when all I was trying to do was help you and I misunderstood and reacted badly. My signature has a description of the options on my project because so many people wanted to know the details. But reading this last response it's apparent you did direct the insult in my direction (and of course at many here with lengthy signatures). Good luck from this point on, I think my reputation here is that I try and help people but in your case i'll just wish you well...

Oh well in that case I misunderstood you as well. Right. Dont need your help Gary. You are the one that took it wrong and shot right back. I simply clarified the situation. How in the world did I make it 40 years building engines and working on cars and bikes with out you. Maybe you should think before you type. How did making your condescending comment help? I will take help from those that are more secure and less quick to pull the trigger.

[Steve986]

Can't you boys have this cat-fight somewhere else? You're boring the rest of us who want to talk about oil.

Now, as I was saying, Mobil Delvac is a CJ-4 formulation. I think it's worth considering, and it comes in a 05W40... although Mobil still stands behind their standard petrol-engine formula in the FAQ area of their website (as they would), they say that Mobil Delvac would perform well in all HP gasoline engines.

Steve

[turboflyer]

Probably but it is entertaining. The oil formulated for diesel engines have a very high ash/soot holding additive. This displaces room for other more important components. There are other differences. I would stick with an oil designed for gasoline engines. The amount of zinc and phosphorus your CATs can tolerate is debatable. If you do not have them it is not an issue. The 0-40 euro still has a good package. And like I said before, I add two quarts of the 10-40 Mobile one motorcycle oil just to bump it up a bit. We still have to have good CATs for smog checks here in Ca. The M1 0-40 gives great cold start lubrication not that other viscosities dont. Unless you are going to be driving great distances on each start up why not minimize wear where it occurs the most, on start up. Also my oil analysis shows it is working extremely well. About 7500 too 8500 between changes max, or one year. You will get a great deal of advise and most will be convinced of their oil. Just take it all in , do some more research and in the interim just change what ever you use regularly.

[Steve986]

Looks like there's an Amsoil dealer here in my area who will deliver to my house! No shipping charges. Their 'european formula' is 05W40.

I hear a lot of good things about Amsoil, my impression is that it's right up there with the rest of the fine boutique oils. The specs look good.

AMSOIL - European 100% Synthetic 5W-40 Motor Oil (AFL)

Steve

[JFP in PA]

Originally Posted by Steve986

Looks like there's an Amsoil dealer here in my area who will deliver to my house! No shipping charges. Their 'european formula' is 05W40.

I hear a lot of good things about Amsoil, my impression is that it's right up there with the rest of the fine boutique oils. The specs look good.

AMSOIL - European 100% Synthetic 5W-40 Motor Oil (AFL)

Steve

Problems begin with the fact that no Amsoil products actually hold any ACEA ratings………in fact, Amsoil does not participate in the ACEA testing program; they evade this issue by saying their products are “recommended” for applications requiring ACEA ratings (in the same manner as Red Line and RP)…….. Recommended by whom? Their marketing department? What possible bias could they have?

You can do better for less money…………

[Steve986]

You can do better for less money…………

So, what do you recommend? My brain is a blur after reading all this oil stuff... I'm about about ready to draw a name out of a hat!

Steve

[JFP in PA]

Based upon literally hundreds of UoA’s, collected over many years, we use Castrol Syntec 10W-40. Holds ACEA A3, B3, B4 ratings, shows excellent TBN’s and the ability to stay in grade under high temp/high shear conditions…………..and I have personally seen this product in 5 quart containers at two local Wal-Mart’s for less than $25 a jug………