Sea Doo 4 Tec Oil Questions - Please Educate Me

[seatsR4toilets]

I have a 2002 4 tec. What is a good, general substitute for the $10 a quart QPS oil?
Also, does anyone know what weight oil that is? I know it's semi-synthetic, but can you use a full synthetic together with it?
Please educate me.

[GTXX]

it's always been synthetic for that engine until BRP dropped full for the semi this year. 10W40 is the right weight

[seatsR4toilets]

So do I just buy a regular 10-40 synthetic?
Or do I have to buy a 10-40 semi synthetic?

[800AMSOIL4U]

If you have a supercharged engine and you want to use the BRP oil use the new semi-synthetic oil or find the older petroleum oil. If it is a non supercharged ski you can use the BRP full or semi-synthetic or petroleum oil. Here is the info on the AMSOIL Synthetic 10w-40 Marine Oil that is safe for either engine.
http://www.amsoil.com/redirect.cgi?z...storefront/wcf

[homebrew]

alot of us use use the marine amsoil -- its done well with me

[Petron]

alot of us use use the marine amsoil -- its done well with me

+ 1. I also use it and cannot complain.

[lextoy]

the 2002 4tec is NON supercharged.
so synthetic is and always has been the normal requirement.
amsoil wcf would be good option.

[Waterlogged2]

Has anyone used Lucas ATV semi synthetic 10-40 in their ski?