Re: 156 correct oil change interval..Help!!
The official oil/filter change interval 12,000 miles or 12 months, whichever comes first. You have the TS engine, so a semi-synthetic 10W40 is fine, I've always used Selenia 20k in the Spider and that seems to work fine. However, I have always changed 6,000 miles/6 months, this keeps the oil clean and will no doubt help the engine long-term. Your car LDorado has done 108,500 miles - that's a lot of miles, there is more reason here to go for 6,000 mile oil/filter changes to keep it in good condition. It's up to you at the end of the day, but I always go for the view that if you look after the engine it'll last longer! Together with keeping the oil level at the max line - never let it go below this on this engine!!!