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I have a 2006 Chevrolet with the 6.6 Duramax diesel engine. I have been using DELO 400 15W-40 in it since I bought it, changing annually or more frequently if noted by by the OLM. I have not been putting many miles on the truck lately and it is coming up on a year since I did. The OLM still...

I have a 2019 Corvette (naturally aspirated 6.2l) and I have been running M1 ESP 0W-40 (recently rebranded as M1 Supercar) in it. In the past, I used the M1 0W-40 in a Porsche I had, with good success. I am wondering about the difference between the two - if they perform the same, I would...

Some of the universal trans fluids say they are good with Dex VI, Toyota WS and Mercon LV. I want to drain and fill the power steering system in a 2017 Ford Transit van, which used Mercon LV. I have a quantity of Ravenol T-WS already on hand. Is it compatible with the Mercon LV or should I just...

This van had 43000 miles on it, I am running a catch can, mostly highway miles, Kirkland 5W-30 Oil and Motorcraft FL500-s filter. Also a Fumoto drain valve. I could go to 8k OCI but probably won't due to the timing chain guide horror stories I read about.

So I compete in hillclimb events in my 2019 VW GTI. I am running a VW 508 compliant 0W-20 oil (Total Quartz) to comply with warranty requirements. During today's event oil temps were at 252F at the finish line. It gradually cools to 235F or so while idling waiting to run back down the hill. The...

I have some M1 0W-40 European oil on the shelf. Looking at the back, it would appear to be OK to use in my motorcycles to top off when needed, since not labeled as energy conserving. True?

I have a 2017 Transit 350 with 3.5 Ecoboost engine. The coolant tank needs to be topped off. The coolant looks pink/red to me in the overflow tank. What color antifreeze should I top it off with? I see both yellow and orange recommended on the O'Reilly website.

My wife drives a 2011 Porsche Cayman Hybrid with the Audi V6 supercharged engine. Oil is spec'ed as Porsche C30 5W-30 and I have been using Mobil 1 ESP or Liquimoly 4200 5W-30 in it. The car now has 100k miles on it and warranty is long gone. Can I safely switch to something like a Castrol edge...

Changed the oil for the first time on our 2019 VW GTI yesterday. Capacity is 5.7L. I had a senior moment and put in 6L. Any opinions on whether I should try to drain the extra 3/10L out of there or not worry about it.

I have a 2008 Landcruiser with the 5.7l V8 and 90k miles on it. SInce I've owned it, I have used TGMO 0W-20 oil at 8k OCI (did a blackstone analysis to establish OCI). But, I see the boxed Havoline PRO DS 0W-20 is literally half the price of TGMO. Should I be concerned about switching from TGMO...

I have a 1997 Toyota Landcruiser with 166k miles on it. My normal oil is Rotella T6 5W-40. It holds 8 quarts and typically doesn't consume or leak much oil between changes. I have 3 quarts of Castrol 20W-50 GTX that I would like to use up by mixing with 5 qts of T6 at the next oil change. Any...

My Porsche Cayman uses a cartridge style oil filter. Several aftermarket companies offer a conversion kit to use a spin on. Is there an advantage to converting to a spin on versus a cartridge style?

I have a 2006 Porsche Cayman S that needs some coolant topped up. I have Peak green, Zerex toyota red, GM dexcool orange and Pentosin Pink in my garage. What is the appropriate coolant to use? The internet is a bit vague on information.

I just bought a 97 land cruiser (actually a Lexus LX 450, but it's the same rig), and want to service it. It has 82K miles on it. I run M1 0W-40 in my VW Passat and M1 10W-30 in my Dodge V-10 pickup. What oil in my cruiser? Manual recommends 5W-30 for temps below 100F. I would like one year...

Is Pyroil PS fluid a mineral oil which will work in a VW PS system? What happens if you run the pyroil in the VW system? Do the seals suddenly develop major leaks? If so, why? Tom

I recently purchased a 99 VW Passat with the 1.8T engine. It has 55K miles. I changed the oil to Mobil 1 10W30. With about 2000 miles on it, the oil is pretty brown - not dark, but getting there. Is this the oil cleaning old deposits out of the engine, or is the oil getting "coked" in the turbo...

Ok, I used to have it all figured out, but then I stumbled on this webpage, and now I am really confused. I recently purchased a 99 VW passat with the 1.8T motor, with 55K miles. The dealership had changed the oil to penzoil 5W-30. After I bought it, I immediately changed it to Mobil 1 10W-30...