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Old 04-07-2019, 07:33 PM
biggun's Avatar
biggun biggun is offline
Join Date: Nov 2010
Location: Abbeville, LA
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Default 4 Stroke Engine and Gear oils?

Ok Guys ..

Since the weather is ****zzy.. A few questions to pass the time..

I'm running a 250 Yama 4 stroke.. I'm using 7 qt.'s of yam 10-30W oil??
$50 worth.. Change is yearly.

I've read on other forums, (The Hull Truth) others using auto 10-30w synthetics etc. Such as Mobil one.

Also I changed gear lube oil to 75-90W Royal Purple after a couple of yrs owning my Triton, and I have noticed a difference in gas mileage. 3.2-3.6 MPG depending on my RPM, trim angle and Sea state etc. Royal purple is $22 Qt. I use 2 qtr.

I was pondering using Amoil Synthetic Marine gearlube to see if there is any difference? Amoil is about same $$$.

Anyone out there with high-performance big bassboats or offshore boats using any of these "different" oils and lubes?

Of course, my mechanic looked at me like I was crazy when I asked these questions?

How about the new Lucas Synthetic lower oil I'm seeing at Academy?

We getting ready for dive and snap season if anyone likes to spearfish, give me a shout.

Ok Guys !!! Let's hear it.. With this rain; saltwater fishing going to suck for couple of weeks.
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Old 04-08-2019, 11:22 AM
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Natural Light Kid Natural Light Kid is offline
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Join Date: May 2009
Location: Lake Charles
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I do not currently own a 4 stroke outboard, but have many other engines. I am an independent Amsoil dealer. All of their products are great. I use them in my Gatortail, vehicles, ZTR, etc. If you have any questions, please feel free to contact me. If anyone on this site is interested in trying any Amsoil products (motor oil, 2 stroke oil, gear lube, etc.), I can offer a discount. I will be placing an order soon and should be able to offer free shipping too!
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Last edited by Natural Light Kid; 04-08-2019 at 11:36 AM.
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