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Discussion Starter · #1 ·
Need to pick your all's collective experience,

I am attempting to perform spring services on my new to me Honda boat engine.(225HP) While getting prices from dealers for supplies I was told that because my engine has 400 hours on it now , I could use synthetic oil and could even buy my oil from an autoparts store. (this came from a Honda marine supply dealer, I guess being nice or honest) Looking into prices at the autoparts stores I found that it is rare to find oil by the gallon(traditional or synthetic) at auto parts dealers. Plus the price difference between synthetic or traditional is appreciable. What do you all recommend, synthetic or traditional? I keep seeing semi synthetic as well. So whats the deal? Pros vs. cons, good places to purchase...ect

Thanks,

Rob
 

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Need to pick your all's collective experience,

I am attempting to perform spring services on my new to me Honda boat engine.(225HP) While getting prices from dealers for supplies I was told that because my engine has 400 hours on it now , I could use synthetic oil and could even buy my oil from an autoparts store. (this came from a Honda marine supply dealer, I guess being nice or honest) Looking into prices at the autoparts stores I found that it is rare to find oil by the gallon(traditional or synthetic) at auto parts dealers. Plus the price difference between synthetic or traditional is appreciable. What do you all recommend, synthetic or traditional? I keep seeing semi synthetic as well. So whats the deal? Pros vs. cons, good places to purchase...ect

Thanks,

Rob
Interesting ...I have found that lately it is difficult to buy oil in anything BUT gallon or 5qt jugs. The days of buying a case of 12 1 qt bottles at most of the local parts stores around here seem to be over. Have you been to Autozone or Advance Auto Parts? They seem to be phasing out individual quart containers in favor of gallon or 5qt. jugs, might be just what you are looking for.
Pat in Joppa
 

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Before going to synthetic on your 4 stroke outboard motor - check with manufacturer. Some DO NOT reccomend synthetic because the operating temperatures are not as high as in an automobile engine and results in a performance issue. Not sure exactly what that is. I know Tohatsu issued a service bulletin on this very issue.

I am a big fan of synthetic motor oil and was surprised to learn this.
 

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FWIW I have been running Mobile one Synthetic in My honda 4 stroke 25hp for three years no problem so far. I change the oil each year+ iI dont put a lot of hours on it the oil is always golden when I remove it after a season.....
 

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Before going to synthetic on your 4 stroke outboard motor - check with manufacturer. Some DO NOT reccomend synthetic because the operating temperatures are not as high as in an automobile engine
So, before taking that to heart, find out if they sell their OWN synthetic. In Honda's case, they do not, so they don't recommend using it. My Honda 130 ran Mobil 1 for 800 hours or so before I sold it.

One thing to more know on 4 stroke OB's - you still want to run RingFree etc in your fuel to reduce carbon in the cylinders and rings. the lower temps and high loads cause a carbon issue over time.
 

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From the Tohatsu website:

Use of synthetic oil is not recommended in 4-stroke outboard engines. Outboards use raw water cooling systems and using synthetic oil may prevent the engine from reaching sufficient operating temperature.
 

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Discussion Starter · #7 ·
Interesting ...I have found that lately it is difficult to buy oil in anything BUT gallon or 5qt jugs. The days of buying a case of 12 1 qt bottles at most of the local parts stores around here seem to be over. Have you been to Autozone or Advance Auto Parts? They seem to be phasing out individual quart containers in favor of gallon or 5qt. jugs, might be just what you are looking for.
Pat in Joppa
Pat, I meant to say I didnt see alot of sythetic in gallons. I did see some traditional in gallons.
 

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I just got a "new to me" yammi f150... It has 300 hours on it and for good measure i went ahead and did all the 100 hour maintinence... I talked to a yamaha dealer and a yamaha parts supply specialist. Both said to stick with the mineral based oil... I was like you though and was planning on switching to synthetic for good measure. Alot of guys reccomend the Amsoil fully synthetic, but researching that topic opened up a whole nother can of worms ( with rants, and opinions, arguing, etc).
I'veheard both pros and cons...but everyone will agree that clean oil is the most important object.
Check it every couple of weeks and when it looks like starbucks coffee, give her a quick change.
Jhw
 
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