Engine Oil

[Fish Head]

I have a 2005 140 Suzuki outboard. The manufacturer calls for 10w-40 oil. For the first time since it was new, I used someone other than the dealer to change my oil and I see from the invoice that they used 10w-30. Is that an issue?

[magnum mike]

It could void the warranty but 9 years old shouldn't be an issue.

[delcecchi]

I have a 2005 140 Suzuki outboard. The manufacturer calls for 10w-40 oil. For the first time since it was new, I used someone other than the dealer to change my oil and I see from the invoice that they used 10w-30. Is that an issue?

Personally I would be inclined to either take it back and get the right stuff or drain out the 10W30 and put in 10w-40 myself. Losing oil pressure due to oil that is too thin at high temperature would bite, so far as I am concerned. Why risk the motor over less than 20 bucks worth of oil. (I assume not Suzuki oil)

[Capt. H (Ret.)]

There is a reason why the oil weight was recommended when you bought the engine. Follow the recommendation.

[RebelSS]

Too thin at higher speeds/temps. Take it back and tell the clowns to put in 10W-40...while you stand there and watch to make sure that they do.

[CaptainMusky]

Right the shop that changed the oil should out what is recommended by the manufacturer. Their mistake not yours make them replace it. They will probably say something like "that's a misprint on the invoice" and they put the right stuff in. That is when you do your business elsewhere. No excuse since its clearly printed right on the fill cap.

[Fish Head]

Right the shop that changed the oil should out what is recommended by the manufacturer. Their mistake not yours make them replace it. They will probably say something like "that's a misprint on the invoice" and they put the right stuff in. That is when you do your business elsewhere. No excuse since its clearly printed right on the fill cap.

That is exactly what they said. They better be right! I hate to think I'm riding around with thinner oil than whats recommended.

[delcecchi]

Some place on Vermilion? If so I would appreciate knowing who. PM if you don't want to post.

I would be tempted to drain what they put in and put in what I knew to be right. The peace of mind is worth quite a bit to me.