5w-30 to 15w-40 (1 Viewer)

Joined
Feb 18, 2010
Messages
127
Hello members, I'm currently running Chevron Supreme 5w-30 and thinking about switching to Chevron Delo 15w-40. Both oils are available at Costco and the Delo is actually on sale :). I have a '92 FJ80 with a 3FE engine with 135k. Is there any downside to switching to the thicker oil? Any loss in protection, MPG, etc? Any upside to switching to the thicker oil? I live out in CA so the temps never get too cold but will make trips out to Tahoe where it does drop below freezing. Any input/experience is appreciated. TIA
 
Joined
Aug 14, 2008
Messages
1,369
Location
Chandler, AZ
Hello members, I'm currently running Chevron Supreme 5w-30 and thinking about switching to Chevron Delo 15w-40. Both oils are available at Costco and the Delo is actually on sale :). I have a '92 FJ80 with a 3FE engine with 135k. Is there any downside to switching to the thicker oil? Any loss in protection, MPG, etc? Any upside to switching to the thicker oil? I live out in CA so the temps never get too cold but will make trips out to Tahoe where it does drop below freezing. Any input/experience is appreciated. TIA

What's the benifit of switching? I wouldn't switch just becuase of a sale. Each engine is built for a certain weight oil and I don't see any reason not to run what Toyota recommends. Why risk it???
 

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