What Weight Oil

20-50 VR1

High mileage? He just had the thing rebuilt, it's basically brand new! Ya crazy canuck!

True. It was hypothetical. My engine is old, and there is a little bit of oil in the bilge. Not sure, maybe rear main. I was wondering if anyone out there has used high mileage oil to do a cheap fix.

CrazyCanuck wrote: I was wondering if anyone out there has used high mileage oil to do a cheap fix.

I do not believe any of the "high mileage" oil contain the ZDDP needed. You've been watching too many oil commercials on TV!!

jallyjames wrote: i would use 5w30 or 10w30 both are widespread engine oils....

Tell us what 5w30 or 10w30 oils have enough ZDDP in them to protect the old flat tappet engines.

SNobsessed wrote: 5W30 is too light for the heavy load on a boat engine. 10W30 is bare minimum. 1200 PPM of ZDDP is a must however, drastically limiting what the options are.

Chris,
I was poking at what I feel is just a spammer from India that has no idea of what he's talking about! I'll bet he has no idea of what ZDDP is,

i decided i wanted to use one oil for everything i own, i use shell rotella T6 synthetic 5w-40 for all vehicles, wet clutch motorcycles, etc, etc.

i use the shell rotella standard 15w-40 for the GT-40 in the boat boat, but i'm also switching that to the T6. i've just seen several recent used oil analysis showing the T6 between 1200 and 1300 ppm of zinc.

good synthetic oils are perfectly fine in a wet clutch. what you don't want in a wet clutch, or shared engine/trasmission lubrication are additional friction modifiers in an oil. They are marketed as "energy conserving" oils.

The Super Tech is not what I would use in the SN, as the lower priced oils have a weaker additive formulation.    Since there is only 1 oil change per year, you are only talking an extra $12 to get the VR1, right?   There is much internet chatter regarding this, & quite a bit on this site too.

SNobsessed wrote: The Super Tech is not what I would use in the SN, as the lower priced oils have a weaker additive formulation.    Since there is only 1 oil change per year, you are only talking an extra $12 to get the VR1, right?   There is much internet chatter regarding this, & quite a bit on this site too.

Yes, it's less about the money and more about feeling that Merc is ripping me off. Maybe not, though, if they really have high levels of quality additives. But I'll settle on one for both boats.

TRBenj wrote: Valvoline VR1 20w50 or Mobil1 15w50.

I think it's coming down to those. Plus maybe Amsoil for some people.

Steve K and I are cleaning up a few details on the oil filter study, stay tuned.

Corey,

The results are pretty clear, and we're just cleaning up some of the numerical ratings.


First, Steve K said the part numbers do NOT necessarily correspond to the right oil filter for the PCM 351W (they were the specific part numbers used in the study), so we'll need to cross reference some of them.


Second, all of these results are from the one study. Other studies will show some variation, and some filter designs may have changed since the study was done in Jan 2011. It is worth looking up your filter's specifics in the Oil Filter Comparison Study, especially the Oil Filter Grade Sheet and the Construction and Comments. Note that this grade sheet includes price in the weighted average (rated slightly higher than media surface area and media volume).

What Steve K did was sort the results and also look at removing price as a factor. I agree with not including price--in our northern climate, I change oil and filter once per season, so the filter price doesn't matter to me. Also, the top five filters are all very good, so if one is on sale at a great price, it could be used for that oil change.


Third, we're just firming up some of the numbers. I believe the main result will be this: there are about five oil filters that this study finds to be very good. After that, things begin to drop, and there are some really terrible filters. Note that we are assuming that these rankings, based on the filter part numbers used in the study, can be extended to other part numbers from each manufacturer (hopefully a good assumption).


It looks like the five filters found to be very good are:

Fram Xtended Guard, Mobil 1, Royal Purple, Amsoil, K&N

We'll post the numbers soon, but I'd be comfortable with any of these (well, except that, as I said, some very smart folks on here *hate* Fram oil filters, so I'm not going there).

Thanks again to Steve K for sharing this good info.

Steve R

Is this the right mobil 1 filter?

http://www.canadiantire.ca/AST/browse/4/Auto/EngineOil/OilFiltersAccessories/PRDOVR~0171633P/Mobil+1+Extended+Performance+Oil+Filter.jsp?locale=en

These oil filter numbers are for a Ford 351W.

The Ford 351W OEM oil filter was the Motorcraft FL1A. The Pleasurecraft Marine Engines oil filter number is PCM R077001.Here are the cross-referenced filter numbers, in essentially the order of the grades table above:

Mobil 1 M1-301
Royal Purple 30-8A
Amsoil EAO15
K&N HP-3001, PS-3001
NAPA Gold 1515
Wix 51515
NAPA Proselect 21515
Purolator L30001
Bosch 3500
Fram PH-8A
Motorcraft FL1A
Delco PF2
STP S8A


Please look these over and reply if you see any errors. Thanks.

Steve

TRBenj wrote: Valvoline VR1 20w50 or Mobil1 15w50.

Are you guys running the dino or the synthetic?

dino -- "Valvoline VR1 Racing Oil (VR1)", 20W-50 p/n VV211

synthetic -- "Valvoline Racing Synthetic (VR1) Motor Oil", 20W-50 p/n 679082.0


Both have 1400 ppm zinc and 1300 ppm phosphorus. Looks like the synthetic is about $2.50 more per quart.