Oil Level Indicator (Dip Stick)

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Ford engine oil level indicators (sometimes referred to as a dip stick or dipstick) are identified by basic part number 6750. Ford used two different service part numbers for the indicators used with the 428 CJ and SCJ engine.

 Engine Oil Level Indicators

Service Part NumberEngineering Part Number
C7OZ-6750-AC7OE-6750-A
D0OZ-6750-CD0OE-6750-C

The indicator includes a chrome handle and a black plastic plug to close the loop of the handle. The C7OE-A indicator was used from the beginning of production through May 1970, when Ford published TSB article #2322 that describes a new oil pan fill level and a new indicator to properly measure the revised fill level. The Ford Master Parts Catalog describes the dimensions of the C7OE-A indicator as '17.42" shield to full', '18.50" shield to add', and '19.25" shield to end'. Actual measurements taken from the bottom of the shield are a little different as noted below.

 

C7OE-6750-A and D0OE-6750-C Indicator Comparison

As shown in the previous picture the D0OE-C indicator is marked "ADD 2 ->| ADD 1 ->| SAFE |<- WARRANTY REQUIRES 101-B OIL D0OE-6750-C <oval Ford script logo> M". The markings on this indicator measure 16 5/16" from the bottom edge of the shield to the lower SAFE line, 17 1/16" shield to bottom of ADD 1 line, and 19 3/8" shield to end.

 

At some point during the 1969 model year the markings on the C7OE-A indicator were revised. The version used during the 1968 and "early" 1969 model year is marked "ADD ᵒ    ᵒ    ᵒ FULL C7OE-6750-A <rectangular FoMoCo logo> M" (image courtesy of Dale McVicker). The markings on this indicator measure 16 15/16" from the bottom edge of the shield to the lower edge of the highest ADD dot, 18" shield to the lowest ADD dot, and 18 11/16" shield to end.

 

We haven't been able to identify a transition date or reason for the change. The "later" 1969 and early 1970 version is marked "ADD 2 ->| ADD 1 ->| SAFE |<- WARRANTY REQUIRES 101-B OIL C7OE-6750-A <oval Ford script logo> M" (image courtesy of James Baker).

 

The markings were revised yet again when a later service part was released. This third version is marked "ADD 2 ->| ADD 1 ->| SAFE |<- WARRANTY REQUIRES SE 101-C OIL <oval Ford script logo> C7OE-6750-A M". The markings on this indicator measure 17 5/8" from the bottom edge of the shield to the lower SAFE line, 18 1/2" shield to bottom of ADD 1 line, and 19 7/16" shield to end.

 

The service part also has a slight dimple in the chrome handle just above the shield and below the loop. This dimple doesn't appear on the original C7OE-A or D0OE-C indicators.