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No one answered the question I had asked, "What does BMW specify for oil viscosity in their Z4 manual, here in the US?" Is it 5W-40?

Higher viscosity oil offers greater protection at higher temps, given the bearing/journal gap amount. At 220F average oil temps, it is highly unlikely that you will have engine wear issues. I never see cars on the street performing as they do on a track or the Autobahn. Look at your average...

Bottom line as agreed upon by the racing engine test: APPLICATION DICTATES CHEMISTRY/VISCOSITY. I've been saying this all along. Street-driven conditions almost always benefit from lower viscosity oils as recommended by the manufacturer. Elevated oil temps from frequent racing/track use warrant...

And another thing: Liqui Moly has many oil viscosity choices, so what does selling oil have anything to do with their recommendation? The bottom line: You have a highly modified Supra. Buy what's best for it.

Didn't BMW make the owner's manual for the Z4? Does that list 5W-40?

I like these apples better: For your Toyota GR Supra’s B58 engine, the recommended oil is 0W-20 C5 synthetic oil that meets ACEA C5 and API SN standards This specification is particularly called for Toyota’s GR Supra oil and is in line with the requirements for the BMW B58 engine that the Supra...

I'd be much more concerned if dozens of the same gen X5s were dropping valves. My Supra was leaking out from the left side diff output shaft before there was 600 miles on the odometer. Since I've never read of another MKV Supra having had the same failure, I'm not concerned about poor...

Absolutely. It was the second time I've been to this particular one. Last weekend was the Rancho Santa Fe and Porsche Carlsbad C&Cs. It's great to see so many attendees of all ages.

I had a great morning at this event, not too far from the Marine Base at Miramar.

Or maybe refrain from using VHB tape. It is very aggressive. 3M makes lower strength tape in various strengths.

I totally agree. Because one party spreads lots of false accusations at Musk, may followers of that party have turned on Tesla. The only reasons I will not buy one are the one-screen-controls-all, the bland interior, and an exterior that is so common on the streets, here in So Cal. I went to a...

A daily should be reliable with a good number of dealerships in the vicinity. Lotus offers neither.

I bought a replacement passenger side view mirror for my wife's 20 year-old Lexus. It came with a removal tool and the replacement mirror subassembly which snaps in place. There was no need for me to install the heating wiring, since the ambient temps never go below 37 degrees. The cost of the...

Does it go away when you step on the brakes?

Perfectly normal for a GR Supra, but easily corrected with almost any aftermarket cat-back exhaust.

I have a neighbor who has one, and I see others every so often around here. Yes, it is expensive, but for a luxury sedan, it is incredibly fast. Not a track king, but certainly a street king of sorts.

....not a Lucid Sapphire. Nothing Tesla makes can outrun the Lucid.

On the bright side, I haven't seen any serious issues with MSS presented here. Maybe check around with other shops?

When I showed the links of the MSS and Dinan springs to a local independent BMW shop, the owner recommended the Dinan springs, primarily because he has a good relationship with them. Of course, that doesn't mean anything is wrong with MSS. The Dinans are not adjustable but are not going to slam...

That seems to be a heat soak issue. I don't know, off-hand if there is a heat shield near the starter, but I'd take a look to see if there should be one and if it's missing.