Recent content by davidc

I have a 95 Millenia with the 2.5L 24 valve K series engine that has run Royal Purple 5W30 or 10W30 since we bought it used with 18,000 miles on it. It now has 104,500 miles (us). Great car and no problems with the lifters. Only have had a fuel pump go out (rare). I did replace the valve cover...

Exactly - the lack of loading, solid lifters helped, loose bearing tolerances all helped and I would expect that any decent API formulated motor oil would have performed about the same. Being a Group 2/3 helped but the real saviour was a decent anti-wear additive package - not the base oil...

I use RP!

Thomas, You've combined two things that are mutually exclusive..... You can not use 'cheap' and 'racing' in the same sentence and be grammatically correct. There is nothing EVER cheap about any form of racing, no matter how inexpensive it initially may appear. Keep the shiney side up! Ciao

Price means very little but in this case, you are comparing apples and oranges. The 5 / quart would be the RP API Licensed oils, not the line of Racing oils that retail for a suggested 9-11 / quart. Kind of like comparing Goodyear street tires to Goodyear Bias ply cantilevered road racing...

I currently race SCCA GT3 Mazda's and have helped out race friends with the Miata's. Prior to the GT3 thing, I raced in Showroom and IT for 10 years. I highly recommend Royal Purple Racing 21 for your 1.6L. A fiend of mine has literally 10 years of racing a 1.6L with using the RP 21 with...

Last time this was reviewed, it does have a form of a chlorinated olefin that is supposedly chemically inert...... where / what information do you have that indicates it does not have a chlorinated molecule of some sort?

Can you say money in more than one language? Re: 'ashless additive technology'. Remember, the bulk of the oil today is built to minimum performance standards to keep the price at an acceptable level to an enduser. If the government enforces stricter air emissions, users pay. They pay more for...

Never heard of PCEO. The common nomenclature in the retail oil business would be PCMO for 'passenger car motor oil' and you are correct on the HDEO as being' heavy duty engine oil' typically implying trucks.

Contrary to your statement, I was able to quantify a 7% increase in my average fuel economy on my first diesel (70K worth) when I changed from conventional 15W40 to a high performance synthetic 15W40. As I learned about the capability of the high performance oil, I also increased my drain...

If you only have 15K on a rebuilt engine, why are you worried about sludge? Jeez, you could have used cooking oil and if you've done regular maintenance, the engine should be clean on the inside. I know this forum is "happy" on flushes but let's be real here - use it to solve a problem. If you...

Yes and it would be preferred if the diesel engine oil also had an "S" API rating as well as a "C" API rating. Here is a link to the API website that gives a description of the API ratings. http://api-ep.api.org/filelibrary/Guidechart2002.pdf Most multiweight diesel engine oils will have an...

Thanks MikeW for seeing my point - there is not alot of difference in finished performance between conventional API products. G-Man and FlimFlamm Here's another reason why to use a higher quality oil than conventional. I purchased one of my 'gotta have cars in my life' back in October 2002. A...

That is also a harsh generalization regarding Racing Oils are only for racing and do not contain detergent / dispersants. That would be something to contact the tech departments from each oil company that you are considering if you choose to use a "racing" oil on the street. There is NOT a...

No offense intended but your example of a Non detergent oil 'claiming ' to have a low anti-wear treatment - the less than 10 ppm of zinc / phos is not a treat rate but trash in the low quality oil's base stock. Non detergent SA motor oils commonly found in US automotive stores and discount...