Originally Posted By: 1996S20
I bought a 1996 Mercedes Benz S420 with 200,800 miles a few months ago,in your opinion should i use MOBIL 1 FULLY SYNTHETIC OIL or a CONVENTIONAL OIL,and which brand oil filter would be best...
The correct question is what oil specification is required by the owner's manual for your vehicle? Find that out and buy the least expensive oil that carries that specification. That will be best.