Who uses synthetic oil

alrite my g/f's stealh tt has 103,000 miles on it and i was wondering if i could run amsoil or redline or something of the nature in it? Also i was wondering if an amsoil oil filter would be fine too? Thanks

I use valvoline 10w30. 96k miles.

I was told by a mechanic that valvoline is good oil for an engine.

I use mobile 1 10w30 100k miles, Honestly I don't think it matters much among the top brands. What I want to know is the difference between synthetic and natural.

I based on studies ive read mobile 1 is a top quality full synthetic and that is what i use in all my cars except the stealth which i use redline.
It is very important not to overlook the oil filter, there are big diffs. in them. long story short go with mobile 1 or k&n oil filters, they use full synthetic media and can handle higher oil pressures that would blow a hole through paper filters. i think i found the info at (stealth316.com).
now if anyone can help me with my driveline issue id appreciate it.

I use mobil 1 synthetic 10w30, it is a prefered brand amoung many 3s'ers

Redline and royal purple are extremely good brands as well in all parts of your car, not just engine oil, and I would highly recommend them.

As far as oil filters...this is a really good read, it is an independent study on all the main brands:

http://people.msoe.edu/~yoderw/oilfilterstudy/oilfilterstudy.html

got mph, I used this as a guide for driveline issues
http://www.stealth316.com/2-awddrainfill.htm
i used synchromesh and mobil 1 75w90 if I remember correctly and it improved shifting quite noticeably.

I use Mobil 1 Synthetic 10w30. :)

i use mobile 1 0w-40, which is really thin.....i heard it was supposed to be good on cars with turbos.

Make sure it doesn't have any oil leaks. If it does, just use regular oil or a high mileage oil, cuz synthetic will leak out fast and you'll need to add frequently, which means more money gone

i'm switching to mobile 1 15w50 here, not too worried about a leak, just replaced the rear main seal which is the most common place for a leak on our cars.

well the best out there is BG,Mobil 1,royal purple, and redline but they are said to give 3-5% power and the others won't be much different but some people notice that the oil leaks out or is burned off faster than normal oil