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to track down everything would require dropping the transmission from under the car, and also dropping the entire front suspension and subframe while also supporting the engine from above (to get the oil pan off). It will be easier to pull the whole engine and trans out, and separate them on the...

Valvetrain from about 7K miles ago And a pic from this past weekend after a wash

yep that's in the plans, but probably not for another 1-2 years down the road. I had the head surfaced, and the valve seals replaced. Not exactly what I would call a "rebuilt head". It's still using all the original valves, springs, camshafts, rocker arms, cam caps and everything else in there.

I wouldn't call it numerous. I've found a little oil around the factory oil vapor box area, where the PCV valve lives. I have some replacement hoses and fittings to install, as soon as I have time to get access to the area. There also may be a bit leaking from the oil cooler sandwich plate at...

yeah I know I could swap out an engine way faster than dealing with changing a head gasket. Took me 2 weeks on my Integra and probably a week or so on my wife's old Corolla, including carrying the head back and forth between my house and the machine shop across town. I could likely get an engine...

lol not really interested in high HP cars to be honest. I'm more into the "slow car fast" kinda thing. One can have plenty of fun and get into plenty of trouble even with the stock 140hp.

So I've had 6 UOA's done on that car, for the last 6 oil changes. Fuel dilution has always shown less than 0.5, and flashpoint always 395 to 405, with OCI's between 6,200 and 8K miles. There was one time I went 8,600 miles, and the flashpoint was down to 375 on that one sample. It's coming up...

well apparently the writings of Dr. Haas on here are known to be outdated and in some cases incorrect. I wasn't aware of that until just now. But, at this point with this many miles on the engine, and having just gotten a good UOA back this week, I ain't changin' it. Mobil1 0w30 for as long as...

yeah, my wife's CX5 is the first and only GDI engine I've experienced. I had a UOA where they said I could try pushing the OCI to 10K miles, but I have no interest in that. I usually change it anywhere between 6K to 8K miles, using Mazda OEM high-moly 0w-20 oil.

I live in the southeastern US and switched my Integra to Mobil1 0w-30 at least 15 years ago. This was after reading the Dr. Haas articles about oil viscosity and oil pressure at cold startup vs. operating temp. My car has 381,000 miles on the original drivetrain, all original internals, never...

Way back in 1994, my Integra manual said to use 7,500 mile OCI's, except for severe conditions then do 3,750. They defined "severe" conditions as many short trips (<5 miles, or <10 miles below freezing), driving on rough or muddy roads, dusty conditions, extensive idling or low speed driving...

ask... what? I'm asking here about oil specifically. I post there on the NB forums about Miata-specific stuff. Been a member since before buying the car in 2019.

thanks for the links. I tried searching but didn't use the right terms I guess. Since continual topping-up is not a long-term solution I'm not that worried about it. I'll pull the engine out, seal it up, and then see how it goes. I've had 3 UOA's done on the car before, the last one with 2...

HAH! I'd love to get rid of this car and get a NC Miata instead. But no way I could afford one right now. Plus, I'm the type of person who tinkers with and tries to fix stuff before selling it. I have not noticed any smoke blowing out, either on cold start or when doing redline runs up highway...

the 5 ppm you mean? Looks like it's been running fairly close to the 4ppm universal average number. I assume that means average of other cars with this engine.

What can happen to a leaky engine if I just keep topping up the oil and not actually doing a drain and refill? The car is a 2000 Mazda Miata with the BP4W iron block, aluminum head 1.8L engine. The engine is not original to the car, which I didn't realize until some time after purchasing the...

Looks like another stellar report on my 94 Integra GSR that I've owned since 2001. 381,000+ miles on the original drivetrain, never rebuilt, and this was sampled just after a 1,000 mile road trip to Tail of the Dragon with plenty of 2nd and 3rd gear VTEC runs on the mountain roads. A little...

Yeah I'll see about checking the coolant itself for hydrocarbons, and will likely do a compression and leakdown test on the engine itself here soon. I'm at around 3,500 miles now since that last oil change with the UOA I posted above. I'll probably send samples to both BS and Wix just to see...

Hey all, my wife and I have owned a 2014 Mazda CX-5 2.5L Touring FWD (Skyactiv non-turbo) since Summer 2016, from 54K miles up to the current 132K-ish miles. I've used OEM Mazda Moly 0w-20 oil and OEM Mazda filters, changed every 6K to 8K miles or so. Since 2019 I've also had Blackstone UOA's...