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I was wondering if anyone knows the actual math formula for calculating fuel premix? I can do the sums, but I'm trying to understand the formula itself. Thanks!

First off... who makes Yamalube? (I assume it's just a rebranded oil from one of the big oil companies.) Second, I have a 2009 Yamaha XT660R, it's a big thumper. The US never received this bike, but the engine is the same as the Yamaha Raptor 660 Quad. It's an Italian designed/made 660cc fuel...

I just picked up an EU2000i Generator. It's got a Honda 100cc engine it. Any recommendations on oil for this? I would like to run synthetic for the sake of longevity, but is this a bad idea for this engine/application?

I'm trying to figure out which oils in the weight of 10W-40, 15W-40, and 20W-50 are lowest in ash. I'm only interested in mineral oil, but discussing synthetic is never a bad thing. :)

Any enthusiasts have a Pneumatic Oil Dispenser at their house? I'm thinking of getting one to keep all the cars I have running Mobil1 5W-30 topped off. More useful, I'm looking for a Pneumatic Oil Dispenser for changing transmission and differential fluid. I can't stand this task, and a good...

I've always wondered why my M3 uses such a heavy oil. It's the S54 3.2l inline 6. I just can't figure out why the car would run such a heavy oil, especially in today's fuel conserving world. I reckon that BMW must have really gone after volume vs pressure regardless of engine temp. They are...

I did a search for RX-7 and not much came up. I just picked up a 1985 Mazda Rx-7 GSL-SE. It's got a fuel injected 1.3 liter rotary engine. The car has 68k original miles, it's still using the oil metering pump and has not been premixed. Here is the manufacturers recommended oil chart...

I was at VatoZone on Friday morning and they were selling 5 qts of Mobil1 5000 5w-30 and a filter for $8.99. I run Mobil1 Syn in my nice cars, but I usually buy what's on sale for my daily drivers. What do you lot think of the Mobil1 5000 dino 5w-30?

I was just browsing @ BMW of Austin for a ///M car happened upon a 1998 Honda Prelude VTEC w/ 40,000 miles! Someone had traded it in the day before and it was off to the wholesaler on Monday so I bought it cash on the spot, they gave me a smokin' deal. How can you go wrong with a nearly 10 year...

When I print the vehicle specs on Amsoil's website it only lists a WIX 46109 air filter for my 4Runner. I want a true Amsoil filter but cannot find a cross reference as to which Amsoil EAxxxx air filter is for my 4Runner. So if anyone knows the EAxxxx part number for the air filter for a 3.4...

I was thinking of picking up the following: HI-FLO OIL FILTERS - 10 PACK (5 of each type 155&156) Fits KTM LC4, 400EGS, 620EGS/LSK, Duke, 640 Adventurer Since my KTM requires frequent oil changes this 10 pack (=5 oil changes) would be significantly cheaper than OEM. But I've never heard of...

I have an unopened quart of Euro Castrol 5W-30 lying around. Since I've moved on in my 4Runner from using this oil I was wondering if I could take this one quart of Synthetic Castrol and mix it with three quarts of dino castrol.

Has anyone used AV lubricants Inc for their UOA? I am just wondering how they compare to Blackstone. Disclaimer: I am not associated with any of them, just wondering if anyone has used them before.

Does GL-5 truly equal hypoid? I had a lot of contemplation on what to put in my 4Runner 4WD. I finally just ended up putting the Mobil1 Synthetic in the front/rear differentials and transfer case. The front diff called for 75-90 hypoid, the rear SAE 90 hypoid and the transfer regular 75-90. So...

This is a one owner 1996 Saturn SL2 (1.9L DOHC), serviced at the dealer @ 30k, 60k, and 90k. OCI is 3k miles on the cheapest 5W-30 Dino available. Contemplated the switch to Syn, but there is no reason at this point. Car still runs excellent, and no smoke. I will have a UOA on it in the next 2...

Who do you folks use for your UOA? What does it normally cost? Sorry if it is a repost, but there wasn't a stick or anything I saw on where to get a UOA done.

My 2000 4Runner 4WD averaged 6,000 miles per year for the first 5 years, now it's even less than that due to me riding my bicycle to work every day. With that being said how often should I change the oil? It does get driven on the weekends, often on the highway to parks for mountain biking. But...