1 Best transmission fluids with higher viscosity affecting fuel economy

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These thicker fluids may slightly reduce fuel efficiency Transmission fluids with higher viscosity can provide enhanced protection and performance in certain conditions, but may slightly reduce fuel economy. The thicker fluid creates more internal resistance within the transmission, potentially requiring more energy to operate. While the impact on fuel efficiency is generally small, it can be a consideration for drivers prioritizing maximum fuel economy. These fluids may be beneficial in high-stress or high-temperature applications despite the potential fuel economy trade-off.
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