Oil change

[Ross F-1]

Originally Posted by Scotty's 52 F3

Oil lab results will give the best indication of what it should be. Most of us just don't do it.

I sent my oil for analysis after a 3500 mile trip plus some local driving (maybe 500 miles). Mobil1 in a clean, recently rebuilt engine. I run a filter with a NAPA Gold element.

The analysis showed the oil was in very good condition, no need to change it on any of their criteria. See attached.

[51 MERC-CT]

Originally Posted by Ross F-1

I sent my oil for analysis after a 3500 mile trip plus some local driving (maybe 500 miles). Mobil1 in a clean, recently rebuilt engine. I run a filter with a NAPA Gold element.

The analysis showed the oil was in very good condition, no need to change it on any of their criteria. See attached.

Don't know if I am reading the report right but are they saying to leave the oil in and check it again in 5000 miles ?

[Ross F-1]

Originally Posted by 51 MERC-CT

Don't know if I am reading the report right but are they saying to leave the oil in and check it again in 5000 miles ?

They knew I'd changed it for the analysis, so what they meant was, "Run the new oil for 5000 miles and have it tested".

[1927Tudor]

I use one of these.....

http://www.lubricheck.com/

[51 MERC-CT]

Originally Posted by 1927Tudor

I use one of these.....

http://www.lubricheck.com/

These units probably work well but those in the flathead community who use oil with ZINC or use ZINC additive may want to pay attention to this statement by the manufacturer of the tester.

"Some specialty or extended use oils with high levels of additives, or with metals such as zinc or molybdenum, may give falsely negative results. Examples include the Amsoil 'Signature' series , Redline oils, Castrol TWS and specialty, non API rated Royal Purple oils."