Got a UOA done for the family hauler. 70% short tripped during this OCI, mostly summer weather. 95F average outdoor temps with low humidity during the OCI. Mostly less than 3 mile trips, with occasional 30 mile highway drives, and a few 1000 mile round trip drives up I5. Suburban has 4.10 gears and 4L80e so highway RPMs are around 2700-3000 RPM. I wanted a 15w40 to deal with the fuel dilution, heat and short trips, and to clean the engine up a bit. This vehicle is 1 year new to us. What are your thoughts on the report, mostly the lead levels?
Thanks.
Thanks.
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