3.0 SC 1983 servivng parts

[Jaz]

Hi Guys,

A service is due on my 1983 SC soon, for its preparation I would like to seek your advise with regards to the servicing : The car is a 1983 911 3.0 SC EUROPEAN spec engine. with hydraulic chain tensioners.

I need your confirmation/advise for the plugs & oil type

PLUGs: BOSCHW3CC (0.7mm)

I've got 12 sets of BOSCH W3CC (0.7mm) plugs, are these the right plugs for this car?

ENGINE OIL:

Should I use 5W40 (fully synthetic) or 10W40 (semi-synthetic)?

I look forward your advise.

Thanks,

Jaz

[ramonesfreak]

i use fully synthetic 10W30 in my 1983. thats what the prior owner used, so i use it. i only drive it from march until november. doesnt leak. but that doesnt mean yours wont. you may have to experiement a few times

cant help you with the plugs. im not sure