Oil guys I need help!

[Zpenter]

About to change oil for the first time and would like to use a full synthetic oil. I have a 2003 210 nautique PCM Excalibur 330 HP rotella 15w 40 is not synthetic but the rotella t6 5w 40 is will this oil work? Idk know much about oil 5w vs 15w please could someone tell me what that means? Bottom line I just want full synthetic oil

[Whitetail15]

mobile one makes a 15w50 full synthetic. that might be your best bet.

[jbach]

i've used the rotella t-6 in everything i own for years. i don't think there is a better oil.

[scottb7]

If you are changing your oil every 50 hours as suggested by mfg then why bother with synthetic?

[Zpenter]

I will change oil every 50hrs. I just want a full synthetic oil and want the best 15w 40 synthetic oil was just wondering what synthetic oil people use in their boat.

[a0128]

Most people probably follow their manufacturer's recommendations. From the PCM manual for your engine

Synthetic Oils:
Synthetic engine oils are not recommended for use in PCM Engines.
Synthetics may offer advantages in cold temperature pumpability and high temperature oxidation-resistance.
However, synthetic oils have not proven to provide operational or economic benefits over conventional petroleum-based oils in PCM Engines.
Their use does not permit the extension of oil change intervals.


Page 22

http://www.planetnautique.com/Correc...%20Manual2.pdf

While there are quantifiable benefits to synthetic oil, given the 50 hour change cycle it's probably overkill. However, it's your engine so you should put in it what you want. I'd certainly stay with the 15W-40 weight that PCM recommends.

[a0128]

i've used the rotella t-6 in everything i own for years. i don't think there is a better oil.

T6 is right on the boarderline of required zinc for your flat tappet engine (recommended 1400ppm, T6 = 1251ppm). What I'd be more concerned about is the weight. 5W-40 seems too lthin on the cold side to provide adequate protection. Most folks running GT-40s of that era (1999) run 15W-40 or 20W-50.

[Nautiquehunter]

Mobile 1 15 w 50 is the only weight recommended for both flat tappet and roller lifter marine engines. You will still need to change at 50 hours its just overkill . I like overkill . I have been using Mobile 1 in all my cars. boats and motorcycles since 1977 and never had an oil related breakdown. If I used conventional oil would things be different? Probably not but after 30 plus years if it aint broke don't fix it.

[jbach]

T6 is right on the boarderline of required zinc for your flat tappet engine (recommended 1400ppm, T6 = 1251ppm). What I'd be more concerned about is the weight. 5W-40 seems too thin on the cold side to provide adequate protection. Most folks running GT-40s of that era (1999) run 15W-40 or 20W-50.

too thin? the only time the 5W-40 oil is "thin" is at cold start up conditions where you need it to be . the recent zinc levels i've seen in used oil analysis' have been higher than what you claim, not that 1251 would kill a cam imo anyways

[Zpenter]

Any one else run Mobil one 15w 50 in their boat?

[Whitetail15]

i ran it in my 2005 196 and 2012 210. one had 500 hours and the other 92 hours when i sold them.. had zero issues.

[Zpenter]

Thanks! Guys I think I'm going with Mobil one 15w50 plus I like that any walmart should have it on the shelf

[rossrips7]

vavoline VR1!

[CHassmann]

Definitely follow PCM guidelines; no synthetic.

[thekneeboardking]

Hi there,

I am from the UK and when I've looked for the oil grades for sale here the grades your talking about seem to relate to motorbikes is this correct?

https://www.ebay.co.uk/itm/112347977974

The valvoline vr1 doesn't seem to be available in this country, any help please.

Regards

David


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