Question for you four stroke guys

[spareparts]

check this topic out
http://www.charlestonfishing.com/for...TOPIC_ID=57068
I have allways liked shell rotella oil, there have been some articles in some magazines about it recently, and I know some highly regarded engine builders that use it regardless of what the sponser stickers say. Most of the big rigs you seee running down the highway are using it, and gettin close to 1,000,000 miles on an engine. I called shell to see if rotella was ok for a four stroke outboard, they were very nice and pleasant to deal with, didn't have to a machine or prompt the who;le time. They said Rotella hasn't been tested for marine four cycle engine, not that it wasn't ok, just it hasn't been tested, of course he said their other division(Penzoil) had a specific four stroke oil for outboards. I haven't tried rotella yet, but after talking to these guys I wouldn't feel bad about using Penzoil. Give them a call(got the # of their website), they are veruy helpful and will try their best to answer your questions

[chumbucket]

Thanks spare.

[cterrebonne]

i can give you first hand experience with this. i used to maintain a fleet of 6 cats for an drilling company through a dealership and they kept haveing break downs due to engine oil not holding up under the extreme conditions. after testing many different types of oils and then sending the oil samples to a chevron lab to get analyzed and then sending the info back to merc engineers the mobil 1 full syn was the best hands down.

[spareparts]

I've used Mobil 1 with good results as well, funny thign, if you read the fine print in the Mercruiser Warranty(not sure about Mercury OB) they do NOT recomend synthetic engine oil and will NOT cover any warranty failure due to its use. That being said, I still think Mobil 1 is a great oil. I used to run it in my 72, when I would first change the oil, the oil pressure would stay up around 40 psi at idle, after about a week of hard driving, the oil pressure would drop to around 20 psi at idle. we were using Mobil 1 in the 2 speed gearboxes on the sweepers, I contacted teh Mobil engeneers thru our company guys, they told me the oil is made in one viscocity, they add viscocity enhancers to create multiple oil rateings for marketing purposes. the viscocity enhancers breack down pretty quick, but the oil still does what its supposed to. Now a days its not uncommon to see 0-5 weight oil being recomended, and plenty of oil manufactures making it. They did tell me not to run Mobil 1 in any engine that use oil pressure to operate vital functions, like the 7.3 International that uses high oil pressure to fire the injectors

[cterrebonne]

yeah brunswick is very very conservative about their warranty. to me that means their products do not have the quality controll that they should. but who knows why they do it. for example if you blow up a new engine during the break in hours if they wanted to be a@@ they could deny the claim.

[spareparts]

some things they will cover years after they run out( ie: water ingestion on inboards) but some things they will deny to the end, a lot of depends on whos talking to them and what they think of you, the customer. Show up at a dealer with an internet purchased motor and try to get them to go that extra mile for you, good luck. And that goes for any product, Brunswick, BMP, Yamaha, etc

[cterrebonne]

i agree with the above.....it definately has alot to do with the dealer if you deal with a reputable dealer that has good raport with the oem you'll have less trouble.