Engine Oil

mfritz

I have 350 Max MPI engines in my 2008 350 Rinker. It is recommended to use synthetic 24W-40 oil. What brand does everyone use?

TonyG13

I use Quicksilver 25W40. Just got some from Amazon. Plan do to the change next week...

https://www.amazon.com/dp/B00C508YTM/ref=cm_sw_r_tw_dp_x_MBHGFb3N9D7G9 

PickleRick

With my high hour 5.7 I used 15w40 rotella.  I use it in everything besides my VW tdi

kordo

I was under the impression that 15w40 rotella was for diesel engines.  Can it also be used for gas engines?  

69fastback

kordo said:

I was under the impression that 15w40 rotella was for diesel engines.  Can it also be used for gas engines?  

Yes

Liberty44140

Walmart stocks quicksilver 25w40 for $25 a gallon. No brainer to go buy that 

PickleRick

kordo said:

I was under the impression that 15w40 rotella was for diesel engines.  Can it also be used for gas engines?  

I've used it in diesels, v8s and motorcycles for decades.  

Black_Diamond

The Rotella has high zddp (anti-wear) additive. Great stuff..bad for catalytic converters. lol. I run the Rotella T6 15W-40 in my 350 MAG’s. 

Aqua_Aura

I run Rotella in my 7.3 and I've had the oil analyzed a few times and even after 7000 miles the oil still has plenty of life in it. I had one go to around 12000 before I changed it and the analysis thought I had given them the wrong mileage but it was 12k

TonyG13

@mfritz was nice enough to sent me a DM regarding the Quicksilver 25W40 - and noted that the label says "4 Stroke Engine Oil."

I reassured him that it is indeed the correct oil for our sterndrives -- as the smaller font down the label does confirm -- "for use in sterndrive and inboard engines."  And most of us have been using this stuff for years.

Anyone know why they label is that way? Are 4 strokes a bigger market? Or why not have a big label that says: "4 Stroke, Sterndrive, & Inboard Oil?"

Just wonderin'

aero3113

Sterndrives or inboard doesn’t matter, the engine is a four stroke.

TonyG13

Just learned something. Thank you @aero3113 (as you can now tell I know nothing about 4 strokes) 

Aqua_Aura

The 4 Strokes

Suck
Squeeze
Bang
Blow

This is not an adult humour joke. That is literally how it was explained to me when I went to school 🤣.


This is a good YouTube channel if you want to learn some mechanical type stuff. 

https://www.youtube.com/user/EngineeringExplained

PickleRick

To further complicate things please explaine the old 2 stroke diesel engines!


I think Mercury uses the 4 stroke and 2 stroke labels so the consumer wont mix the two up.

A 2 strokes eats and pukes at the same time.  

Aqua_Aura

Those 2 stroke detroit diesels are really cool. I think I saw how they work at some point but forgot. 

Good point on the labeling of 2 and 4 stroke otherwise people probably would mix them up. 

PickleRick

Ive got a dual fuel kubota engine sitting at the shop right now.  Shares the same block as the 3 cylinder diesel only she's built to run propane or gasoline.  


Engines used to be simple

YYZRC

Aqua_Aura said:

The 4 Strokes

Suck
Squeeze
Bang
Blow

This is not an adult humour joke. That is literally how it was explained to me when I went to school 🤣.


This is a good YouTube channel if you want to learn some mechanical type stuff. 

https://www.youtube.com/user/EngineeringExplained

That brings me back to high school shop class!
Also ICPE: Intake, Compression, Power, Exhaust

Ian

I’ll remember @Aqua_Aura’s first...

mfritz

Thanks for all your comments!!!

McGarnicle

I’ve been running Amsoil in both my motors and drives 

RiverRat232

Another vote for Rotella. I use it in my diesel tractor, gas tractor, motorcycles and boat. The cars and truck get Mobil 1.