i was told today from BG inc. tech engineer that royal purple is an excelent blender they use superior quality 100% additive package and base oils both 100% sysnthetic base oil isiso-paraffinic diluents..where as redline is a mediocre blender...he also said amsoil and mobil 1 are excellent..all this is based on what the insides of blenders and where they get the additives and quality of synthetic base oils...maybe this is why we are seeing poor oil anal. on redline?...he knows about schaeffers but wwas not familer with theirs products...conclusion: if you use a synthetic use mobil 1 or delvac 1,amsoil,royal purple,he said there are alot of good oils out there but these are the absolute best..redline is a good company but their product no where come nears the high quality of synthetics as the aforementioned oils.....your opinions? molekule?