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Who is using synthetic oil in their 4 stroke boat motor

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Now that the warranty is over on my Suzuki 140, I was thinking of switching to a synthetic 4 stroke oil. I have switched to synthetic in my small 2 stroke engines and they have never ran better. Wondering if it's worth the extra cost and the advantages of using it.

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Synthetic in everything also and for years. I changed it in the spring before the open water season and then again about half to 3 quarter of the way through the season depending on the hours I put on the motor. I know, I am spending alot on oil but I do change it for the added protection, fresh oil cannot hurt. Any motor will last longer with keeping the oil fresh.

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I use synthetic in everything.

Truck, boat motors, lawn mower, weedeater, generators you name it.

I wouldn't hesitate unless the cost is a factor.

Don't own a 4stroke but agree, synthetic for all

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If you are concerned I would just make sure it is a NMMA FC-W certified 10-w40 oil

Here are some you should be able to find more easily.

Suzuki Marine 4-Stroke Engine Oil 10W-40 MOTUL

MOTUL Outboard Tech 4T 10W-40 MOTUL

AMSOIL Formula 4-Stroke Marine Synthetic 10W-40 AMSOIL, Inc.

Mystik JT-4 Full Synthetic 4-Cycle Marine Engine Oil 10W-40 CITGO Petroleum Corporation

West Marine Premium 4-Cycle Outboard Oil 10W-40

Penrite Oil Marine Outboard Four Stroke 10W-40

Star brite Pro Star 4-Stroke 10W-40 Outboard Oil

Sierra 10W-40 Semi-Synthetic Oil

I have used both Amsoil and Mystik lubricants without any issues.

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I am going to use Amsoil if I switch to synthetic, just didn't know if I could say the brand on here. I switched to Amsoil Sabre in my small 2 stroke motors and love it. My old Jiffy ice auger has never ran this well. Anybody know of a store in the south metro that sells the Amsoil 4 stroke marine oil instead of going to a private dealer? Mills Fleet Farm does not have the 4 stroke marine oil. Thanks for the comments guy's.

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There are many good synthetics out there including Amsoil. If you are going to use Amsoil the best way to buy is directly from their HSOforum. Become a preferred customer with a small fee and you get the products discounted and delivered to your door. You will save a bunch of money this way. The dealers will charge you a couple bucks a quart which adds up in a hurry. That is how I buy all my amsoil products.

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Now that the warranty is over on my Suzuki 140, I was thinking of switching to a synthetic 4 stroke oil.
What oil were you running in the Suzuki up to now? If it was the Suzuki oil, it already is a synthetic oil. At least the stuff I use is. I have been happy with everything in using this oil in my 150 and I wouldnt hesitate to continue to use it.
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I have been running the Suzuki oil which I believe is a synthetic blend since new, wondering if going full synthetic such as Amsoil would be beneficial

at all or a waste of money.

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