Suzuki DFI 140 4-Stroke Synthetic Oil?

ggraycar

Cadet
Joined
Dec 23, 2002
Messages
6
I am a firm believer in synthetic oil, however, my Suzuki dealer is deadset against it. Saying it could cause seal leakage (old problem with early synthetics). Plan on going with Mobil-One 5-50 after about 100 hrs (break-in). Abolutely no problems after 70 hrs now. This engine is a jewel. Suggestions?
 

Waterbugtoo

Petty Officer 1st Class
Joined
Nov 19, 2002
Messages
245
Re: Suzuki DFI 140 4-Stroke Synthetic Oil?

Why would you change what works?
 

radsrh

Petty Officer 1st Class
Joined
Oct 30, 2002
Messages
250
Re: Suzuki DFI 140 4-Stroke Synthetic Oil?

I also am a firm believer in synthetic's I plan on running it in my 1999 Honda 90. 2 questions for you one why wait for the 100 hr mark to run synthetic, the old thinking was that you had to break in a motor on dino juice before running synthetic that is no longer true. If you check Mobil1's site they say you do not have to break in on regular oil, they have a list of new car lines that come from the factory with synthetic oil, I also have a few mechanic friends that also say it is ok to run synthetic from the start. Question 2 why are you going to run 5W-50 what is recommended in your owners manual, I e-mailed mobil1 to ask them about synthetic and they said no problem in a outboard, just run the weight recommended by the manufacture
 

lakensea

Chief Petty Officer
Joined
Jan 30, 2002
Messages
542
Re: Suzuki DFI 140 4-Stroke Synthetic Oil?

Marine grade 4-stroke oil has additional additives to help fight corrosion due to the moisture in marine enviorments.
 

Skinnywater

Commander
Joined
Mar 7, 2002
Messages
2,065
Re: Suzuki DFI 140 4-Stroke Synthetic Oil?

I'm running Redline synthetic racing 5w30 (Honda recommended weight)oil in my Honda. It states right on the bottle NOT to use in engines that aren't broken in. It hampers the process. I switched to it at 20 hours, I've got 97 hrs. as of todays 2 hr. blast on the river.<br />My past experience has shown that CHANGEING TO synthetic isn't good for high mileage engines. It isn't good for new fresh engines. It's the best otherwise. The finest engine(auto)manufactures are all recommending it.<br />Mobil 1 is a good synthetic. It's available and reasonably priced.<br />The Redline comes from Turbine and racing applications, is hard to come by and is $7 a quart.<br />My Honda dealer hasn't a problem with me using it.<br />Four stroking it at 6,000rpm is a beautiful reason to use synthetic. I've not seen any white goo in the valve cover indicating a moisture problem.<br /><br />I know hundreds of engines, all kinds, all applications using synthetics over several years without any seal or other oil related problems.<br /><br />Your Suzuki dealer wouldn't be able to tell what kind of oil your using. <br /><br />Those twin cams and timing chains sure would like the synthetic. I'll bet you'll feel, hear and see the differance after you change, like I did.
 

Oil Man

Petty Officer 3rd Class
Joined
Nov 5, 2002
Messages
76
Re: Suzuki DFI 140 4-Stroke Synthetic Oil?

I agree with lakensea. Use a synthetic that is made for marine use, or has a high enough TBN to counteract the moisture/corrosion problems. Check out www.UltimateOilTechnology.com/marine.htm for a description and technical data on what Amsoil has to offer for marine use.<br /><br />Dave
 
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