Unveiling the Powerhouse 5w30 vs 5w40 Oil Showdown

For modern cars, just follow the owner's manual recommendation and you will be good even if you run 15-20min track and let the car rest. 5W-40 is as thick as single grade 40 weight at 100°C, and will pump down to -30°C (at least right after oil change). 5W30 High Mileage Synthetic Blend Oil Change Service. Pennzoil® High Mileage motor oil is formulated for engines with 75,000 or more miles. It is specially ... I believe 5W-40 would actually be better! It might increase fuel consumption slightly, but I don't see any other issues with using it. Outstanding engine protection. 10,000km or every 6 months (whichever comes first). SEMI SYNTHETIC 5W-30 API SM. SERVICE CENTRE & HIGHSTREET. Availability: 3L ... The 5w40 will be thicker when warm. Full synthetic also tends to flow more freely when cold. The S2000 user's manual has a temperature range for oils... basically 10W-30 is recommended for "normal" climates, while 5W-30 is recommended ... ... or diagnostic device necessary. There's even a conference room for ... The X7 5W30 I've seen it sold for nearly half the RRP listed price. Wondering if you can use 5W30 and 5W40 oils together? Watch this video to learn whether mixing these two oil grades is safe for your engine. 5w40 is thicker/more viscous, and only when warm. So 5w40 is worse fuel economy etc. It's not a huge difference though.