Amsoil VS Walmart Mobil One
04-25-2022 | 07:17 PM
#11
Platinum Member
Joined: Jul 2013
Posts: 833
Likes: 639
From: Paducah,Ky
This topic of oil has been debated many times over the years. I've used the Merc and Quicksilver both as well as Mobil in engines past. Now in the new 525efi whipples I'll be using the Castrol 20w-50 due to that's what Eddie Young says to run in those. He recommends that in all of his engines, so since he built them I'll run what he says. Especially since it is way cheaper than a lot of the other oils. Wix filters are the ones I'll use for sure and have used them many times in the past.
04-25-2022 | 07:54 PM
#12
Registered
Joined: Nov 2004
Posts: 14,140
Likes: 3,708
From: On A Dirt Floor
Yup, less than $25 for 5 quart jug 20w-50 vr1 conventional
04-25-2022 | 10:56 PM
#13
Charter Member # 55
Joined: Oct 2000
Posts: 20,271
Likes: 2,512
From: Omaha/LOTO
Personally, I think 15-50 is too light. As a bargain, 20-50 Mobile 1 at Walmart is a good deal, but for a few bucks more, you can have Amsoil Dominator 60wt. Which is great stuff. With BigBlock applications, 496Mag/HO and 525 style engines the oil pressure maintains better even after hard runs, its specifically made to assume a lot of gas ends up in the oil, the oil lasts wayyyyy longer than conventional 20-50 so at the end of the day, Dominator 60wt really doesnt cost more since it can stay in your engine much longer. When my Mobil 1 was dirty, the dominator was still red and clean.
04-26-2022 | 03:40 AM
#14
Registered
Joined: Aug 2007
Posts: 1,422
Likes: 1,062
From: Orlando, FL
The 15w is only a weight rating for cold temperatures and matters very little for boats. It still has a 50 weight viscosity rating at normal operating temperatures. Oil pressure is the restriction of flow. If you put 90 weight oil in your engine the pressure would be higher, but the flow would actually be lower. The 496 engines were designed for Merc 25w-40, so any oil with a 50 weight rating is more than enough. When oil gets dirty, that means its doing its job and removing contaminants from the engine.
04-27-2022 | 06:37 AM
#15
Gold Member
Joined: Jul 2008
Posts: 3,748
Likes: 869
From: Delray Beach, FL
...and now we are into a full-on oil thread
04-27-2022 | 06:42 AM
#16
Registered
Joined: Nov 2004
Posts: 14,140
Likes: 3,708
From: On A Dirt Floor
Six of one, half dozen of another. Only in terms of Dominator 60, because I love that stuff, my engines always ran cooler and a testament to that, I think its clean because the engine parts arent wearing to begin with due to the superior oil film hence lower temps.
...and now we are into a full-on oil thread
...and now we are into a full-on oil thread
04-27-2022 | 08:40 AM
#17
Registered
Joined: Aug 2007
Posts: 1,422
Likes: 1,062
From: Orlando, FL
04-27-2022 | 09:40 AM
#20
Registered
Joined: Sep 2002
Posts: 764
Likes: 238
From: Boerne, TX.
I've always like Valvoline VR1 20/50 because of the added Zinc content but I'm not a scientist or expert on the fundamentals of molecules in oil and how much none of that makes a difference with how often we all change the oil in our boats. Sometimes it comes down to availability and what you can always rely on being able to get. Being in the automotive industry everything is getting harder to get (oils, filters etc.) so always buy extra!
