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This is the forth fill of green GC in this engine. The date codes on the bottles were all M04023 for that fill. The engine had 63,129 miles at this oil change. I ran the oil from 10-20-06 to 3-25-07 with zero make up oil added. My daily commute is 20 miles each way, 70% highway. There was one...

I know that a UOA will give me a better reading, but I would like to at least use the OCI formula to calculate an approximate initial interval for using with my stash of green GC. I have seen several different "C" numbers quoted for GC in my searching on the BITOG site. What is the general...

With some/most of us here building stashes (or hording as some have called it), of GC for future use, I am a bit concerned with this comment on the Castrol SLX spec sheet; "Storage; "All packages should be stored under cover. Where outside storage is unavoidable drums should be laid...

I am looking for an oversized oil filter with 20 x 1.5mm threads. The largest I have found so far is a NAPA FIL1344 or the equivalent Purolator PL24458. These are approximately 4.06" tall and 3.25" in OD. Is there any larger units out there? TIA.

My Germany is not so good, but it looks that this spec sheet from the Castrol Germany site may hold more info on the "elf and magic green formula"; http://129.35.64.91/bpglis/lubtds.nsf/technicaldata/129DB0C0535CFBC6C1256F63004E45F6?OpenDocument This seems to be for our much loved GC 0w-30 by...

I stopped in at Murray's Auto parts here in Cleveland looking for the 5w-40 Mobil 1 Truck & SUV oil with the yellow cap (not this far east get) and found instead that they stock Amsoil 5w-30 and 10w-30 oil on the shelf for $5.99 per quart. They were the ASL product code for the 5w-30 and the ATM...