OIL

[dantheman]

Just wanted to take a poll to see what everybody is running in their 5.7L excaliber.

I have been running Shell Rotella 15W-40, Both the owners manual and the shop manual wants you running a 15W-40 with a SJ spec.....

[SNMike]

RE: OIL

Royal Purple 15W-40.

Regards!! Mike

[MARK-S]

RE: OIL

I run Shell

[JUST-IN-TIME]

RE: OIL

just to let u guys know
shell just took out the zink in all oils!!!!

[mf01]

Even in the Rotella?

Maybe I should stock up at Walmart.

[JUST-IN-TIME]

Even in the Rotella?

Maybe I should stock up at Walmart.

yeser, make sure it is old stock!

[TRBenj]

Even in the Rotella?

Maybe I should stock up at Walmart.

yeser, make sure it is old stock!

As of about a year ago, that is not true. The zinc was removed from the multi-weight Rotella (15w40, for example) but was not removed from the straight weights (30w, 40w).

Has something changed, or were you simply making a blanket statement?

[JUST-IN-TIME]

call and ask them

[TRBenj]

Thats what I did a year ago, and spoke with an engineer at length. If you have some new information, why dont you enlighten us?

[JUST-IN-TIME]

i heard it from the diesel guys because they run straight oil
one of my really good buddies who owns a shop on the east cost

so I'm taking his work

[mf01]

Even in the Rotella?

Maybe I should stock up at Walmart.

yeser, make sure it is old stock!

As of about a year ago, that is not true. The zinc was removed from the multi-weight Rotella (15w40, for example) but was not removed from the straight weights (30w, 40w).

Has something changed, or were you simply making a blanket statement?

I just looked at the bottle of Shell Rotella 15w40 and it states CJ-4. According to Bob is the oil guy it contains 1504 PPM of Zinc. Here's the test: http://www.bobistheoilguy.com/forums...52#Post1056852

[LT206]

can someone provide the short version of why zinc is important in oil......for us uneducated folks

[BP22]

Rotella 15W-40

[JUST-IN-TIME]

that was 3 months ago
i believe they just dropped it


as for zinc
it helps on less wear on the cam and lifters
the high pressure points of any engine

[TRBenj]

that was 3 months ago
i believe they just dropped it


as for zinc
it helps on less wear on the cam and lifters
the high pressure points of any engine

The 15w40 meets the API CI or CJ standard, the straight weights only meet CF. There was a significant reduction in the allowable zinc and phosphorus between the CF and CJ specs. The Rotella 15w40 went to CJ4 over a year ago. According to Shell's website, the straight weights are unchanged and still have the zinc.

Read this article if you want to know why zinc and phosphorus are important: http://www.hotrod.com/techarticles/e...ech/index.html

Its important to note that all Ford 351w's in our boats are flat tappet motors. The Chevies after ~1996 are all roller, so they can run oils with the lower zinc levels without issue.