Unlocking Engine Potential 5w30 vs 5w40 - The Ultimate Showdown

5W-40 oil stays thicker at high temperatures than 5W-30. If you live in a place with a particularly hot climate (Arizona, for example) using 5W- ... Comments69 · Will Thinner Oils Damage Your Engine? · Why I switched from 5w40 to 0w30 in my 340i · Ditching 0W-20 Oil In The 22 WRX · 20W-50 vs 5W- ... I was told that those of us who have smoking turbos and are using 5w30 Synthetic need to switch to 5w40 synthetic based on a bulletin thats ... 5w40 is thicker/more viscous, and only when warm. So 5w40 is worse fuel economy etc. It's not a huge difference though. 5W40 is thicker at higher temperatures and remains more stable than 5W30 in hot weather conditions. While both oil types resist breakdown in ... For example, if the original car is 5W-30, you can choose 5W-40 or 0W-40, but you cannot choose 5W-20. The original car requires high oil ... Explore the variations between 5W30 and 5W40 engine oils, learn about the benefits, suitability, and differences in performance. Quality engine oil formulated for your vehicle at Repco. Your local Repco stocks a 5w30 or any other grade of engine oil from Castrol, Penrite, ... ... 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. Difference Between 5W30 OIL and 5W40 Which is Best for Your Car? 63K views · 1 year ago ...more. Auto V Fix. 48.6K. Subscribe.