What oil is best for engine break in????

[70 Forest Green Zee]

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You can't go wrong with the Gibbs oil but it is a bit pricey .Shell Rotella T oil has the ZDDP for now but that will change also .

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Shell has already taken a good portion of the ZDDP out of Rotella starting at the beginning of 2008 when new diesel engine vehicles were required to have a catalytic converter. Shell claims that the new Rotella still has some ZDDP in it but not near as much as the old formulation. The old formula Rotella had an API rating of "CI" and that is the version of Rotella that has the high level of ZDDP...the new formula has an API rating of "CJ" and that formula of the oil is the one that has the reduced levels of ZDDP. Anyone who is thinking of using the new Rotella be aware that the ZDDP level is not near as high as the ZDDP level was prior to 2008.