Re: Motorcraft 5w20 prices
I'd spend the extra buck a quart and get full synthetic. "Semi snythetic" isn't always what it seems. In some cases it can be worse than regular oil due to too much additives and no synthetic stocks at all. It's all in the marketing because it brings manufacturers more money than full synthetic or standard oil. Stick with a quality standard oil if you don't want to go all out full synthetic. I worked for one of the larger oil companies here in Ontario for many years.
Another marketing ploy is the "Up to 10% ethanol" signs on fuel pumps. Very rarely does any one fuel delivery contain more than 5% ethanol, as 90% of the vehicles still on the road cannot safely run more than 5% and the petrol firms know this. In most cases it's in the 3-4% range and can reach 5% in the winter months.
Anyway, go with full synthetic if you don't burn much oil, it's lower cost in the long run due to the longer drain interval and you'll also make the environmentalists feel better.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!