What kind of oil do you run?
 

I have a 454MAG. Been running valivone 30w. Good? Bad?

I've always run 50W Valvoline racing oil per my engine builder.

I use Merc 25-40.

mobil 1

Amsoil 20/50 series 2000 :D

Run a multi vis 20w50.
Ken

Good choose I have been using it for years with zero problems but the 40W

valvoline 40w racing

Used to run Castrol GP racing straight 40W but they discontinued it. Now I run GTX 20-50.

I run Amsoil series 2000 also.
If you are in a Northern climate and don't boat in warm water much the 30w will be fine. If you are mid to South I would only run 50w or synthetic.

Mobil 1 Gold Cap, 15W50

i throw in a bottle of comp cams break-in additive with mine. little pricy but i've been told it's cheap insurance for flat tappet cams

Whats everyone think of Royal Purple? I usually run Mobil 1, but it was suggested by my builder I switch to this.

I run royal purp racing blend. Put 100 hrs on the engines last summer. No problems thus far. Looks kinda weird...kinda purple. Alot of folks here on the Tickfaw run it.

Royal Puple 40 weight 502 Mag

Valvoline Racing 40W per engine builder. He won't warranty unless I run this oil. I change every 20 hrs.

Mobil 1 15-50.

Valvoline racing 40w

Penrite 15w-60 540/871 900hp

Mobil 1 V-Twin

Royal Purple
 

I work on an offshore oil platform and when we instaled new bulk air compressors and mud transfer pumps we were having problems traced back to oil. Had royal purple give demonstration at one of the mechanical schools and decided to switch to their oil. Belive it is 20/50. Have not had problems since going on 5 years. This mud can weigh as much as 18 lbs per gallon. Bear in mind this eguipment run pretty much 24/7 and oilfield hands are notorious for being "rough" on equipment.

Do any of you do oil analysis to determine how the oil is actually performing or for one oil versus another oil comparison? If yes would you post results?

AMSOIL 20w-50
 

We do oil analysis on my dads 288 Sunsation. At 100 hours the oil was still perfect, no wear metals and the additive package was still strong. He does however use the AMSOIL Marine Bypass filtration system, which does help. To those of you who have started using Royal Purple, be careful with their products, its not as good as it used to be. It is a highly refined petroleum product and does not have the same strength as it once used to. Here is a link to an independent study of gear lubes, but it gives you the idea of how Royal Purples products stand up to others. Some categories they are good, but some, they absolutely fail the tests. http://www.amsoil.com/products/gearl...hitePaper.aspx

You can download this brochure.

I have one season on each of : Merc 25W40, Valvolene 20W50 V-Twin and Amsoil 20W50 Series 2000 racing oil. Unfortunately each winter I made significant modifications to the engine so the comparisons are undermined. The Merc was a refill when the original oil was changed after breakin and had the best marks. The Valvolene 20W50 V-Twin was used after new heads (ported) and new cam/valve train intake manifold ported/polished and ECU reprogram with breakin of those. Additive Package still solid but more wear products and a little fuel which were likely from the break in of new components and reassembly of engine. The Amsoil 20W50 Series 2000 racing oil was used after the heads were additionally ported, new cam, new exhaust, timing advanced slightly and ECU reprogram. The oil had very high fuel content so viscosity was down and wear products similar to previous oil. Engine hours were 90/80/50 respectively. This time engine completely torn down and lots of new parts going in. After breakin using Amsoil 20W50 Series 2000 racing oil again.

Have you tried other oils in the same motor and run analysis that you can compare results for same operational conditions?

Rage,
No, I haven't done any comparisons on Marine applications, however, I have compared 25,000 mile oil used in a battery truck fleet of my customers, compared to fresh Shell Rotella T out of the bottle, and the 25,000 mile oil was still cleaner and stronger than the Shell Rotella out of the bottle.

What is the 25000 mile oil?

Bill, what you doing to the nordic this winter? See you soon.

Scott

If you had a pair of Merc Racing 850's - what would you run?

A good 20w50.

Ken

Rage,
The oil I was talking about had 25000 miles on it, without being changed. That is what I meant.

I run a ProCharged modified motor with no t-stat my builder is afraid I will not build enough oil temp.

M-1 V-Twin 20W-50

No need to run a multi-viscosity oil, unless you are running in cold temperatures. The viscosity index improvers, which give the oil it's multi-viscosity rating, actually reduce the metal-to-metal protection in high shear conditions. That's why you have several posts here where then engine builder specified the owner only use straight weight oil. The higher the viscosity of the base stock, the more protection you have.

Michael