certain weights are better for certain temperatures. you want a thicker oil in the summer and a thinner one in the winter. check your owners manual for the proper weight for the temperature. as per brand, i've always used castrol but mobil 1 is good too.
Incoming:2013 Candy White VW Golf TDI
Sold:2004 Silver Gray M3
Mods: Dice Unit, EAS Angel Eyes, Painted Reflectors, CSL Diffuser, Smoked Corners, PSS10s, 15mm Front and 10mm Rear Spacers.
Gone:1990 Brilliantrot 325is
Mods: Alpine speakers and HU, Euro Projectors, Magnaflow Muffler, Euro Smoked Tails and GC Coilovers.