Can I Mix 10W 40 with 5W-30?
Yes, you can mix 10W-40 oil with 5W-30 oil, but there are some important considerations to keep in mind: Brand Compatibility: Mixing oils from different brands may not be ideal. Each brand uses different additives, and if you mix multigrade oils of different brands, the additives and viscosity index improvers (VIIs) may not be compatible. […]
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