Baddog: Go visite Key Oil. They should cut you a good deal on Mobil. Tell them the ExxonMobil distributor General Petorleum sent you. They should cut you a deal so you don't have to go hunt the **** down

Cool, better stated with logic. Now, if I had my choice would I run Red or Gold in a SuperCharged 502?

Gold. That's all that's around. They are both great products. Only gold is around now. You will be fine with it.

Here's another oil that likes a lot of magnesium: Mercruiser's 25w40. Tons of ZDDP/phos too. Low calcium. Interesting oil, nothing else quite like it on the market.

Magnesium 1063
Calcium 422
Phos 1362
Zinc 1546
Moly 0
Boron 196
VIS @ 100C Cst 15.14

The good news is that Goldcap 15W-50 is now better than Redcap was. It has more ZDDP for anti-wear...and ...a bit more boron to keep your engines free of carbon and it does retain moly as Redcap did. All for 45 cents/qt more than Redcap in gallon containers at Walmart.

Everything I read is that any batches in question were out there in January...a Wallmart moves it's M-1 stock REAL fast.

Drain...change the filter...enjoy....it's a better product. All the recent most 6 month data tests bear this out.

Any synthetic oil will protect better than any conventional oil. Take a load off your bearings...

Message from Merc to home...if you use a conventional oil be sure it has a lot of ZDDP in it and it is a straight weight capable of retaining a high CST at 100*C. Many multi-vis conventionals won't do this. Merc wants cSts of at least 15.14@100*C. This now benchmarks all CONVENTIONAL and synthetic oils too.
Well ZDDP is for anti-wear...the rest are detergents....more of a concern that you need more detergency in a diesel engine or engines susceptable to carboning and coking.


Goldcap 15W-50
P-1223
Zn-1376
Vis @ 100C Cst 17.9 Holds viscosity extremely well and better than Merc's straight weight blend.


M-1 20W-50 V-Twin
P-1683
Zn-1823
Vis@ Cst 100*C 19.9 ...pitbull #'s

M-1.. V-twin rules...just want ya all to know that.

Remember...bob's guys and anyone in the know will tell you any similar synthetic oil is always better than a conventional oil. It's all about film strength...conventional oils NEED a ton of ZDDP in order to "survive"....synthetics while not needing as much "put it to better use"....


Now your job is to find me all the conventional oils with high ZDDP that come in with a csT@100*C of at least 15.14...it will be interesting to see if ANY multi-vis conventionals can and if so what ones.

EXACTLY-when my motor made 944hp 2 months ago on Crocketts dyno he set the air fuel ratios at 11.2-11.4. Tyler calls it "fire -hosing the fuel to it". I change my oil around 15-20 hours and it is ALWAYS thinned out with excess gasoline. I also get a TON of condensation in the oil from cold lake water going thru motor,it only runs around 100 degrees.I run kendall gt 20/50 mainly because i can't see dumping premium synthetic oil after 2 -3 wks of run time,especially 17-18qts from my single engine. My 540 rods and mains looked like new at 138hrs when i tore it down to freshen it this spring. Even in the warm water of lk winni last week i had 75-80 psi of oil pressure above 2000 rpm's with my motors clearence around .003 on rods and mains,Smitty

We had the same problem with the Sterlings. There was water, and gas in the oil. We used the Mobil 1, but that's only b/c we sell it. If we didn't have an abundace around we would of used something else.

Yup second best is a high ZDDP 40 or 50 wt..BUT Sterling told me they use 15W-50 M-1...if I COULD buy a Sterling I WOULD buy M-1.

FYI..Mercury Marine makes a really great conventional blended straight weight....if you want it conventional this is a good product friends.

I keep getting bombarded for my "top ten list"

Now that we have Mercury 25W-40 analysis data we know a lot more about what they have found through much testing what is needed. My picks are the same:

If you want maximum protection a premium synthetic such as:

-Mobil-1 20W-50 V-twin
-Amsoil Series 2000 20W-50
-Redline 20W-50

-Mobil-1 Goldcap 15W-50 is fine for most all applications.

Then either Mercury 25W-40 straight weight blend.. or a straight weight 40 such as Kendall or Castrol.