Wow, what a picture...I think you should write a review on them and see if it gets posted...lol. :wink:I know folks have mentioned not returning to dealer for the free oil changes. I'm one. When I bought the car (used), they said they changed the oil and filter and I would have one free O&F remaining. I had asked them what type of filters they use and was told an AC Delco... However, this is what they stuck on it, a Parts Master 67060. So much for the GM dealer keeping my car all GM... Hawk Chevrolet & Cadillac in Joliet, IL.
I use Mobil 1 5W20.
AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.
Protects Your Engine
AMSOIL Signature Series Synthetic Motor Oil provides outstanding anti-wear protection. It develops a strong fluid film that keeps metal surfaces separated while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. In the industry-standard Sequence IIIG Engine Test, AMSOIL Signature Series Synthetic Motor Oil delivered 75 percent more engine protection against horsepower loss and wear than required by a leading industry standard.** For details, see the Double-Length Sequence IIIG Engine Test Technical Study (G3320).
Maximizes Fuel Economy
Signature Series Synthetic Motor Oil is designed to maximize energy efficiency for optimum fuel economy. Unlike conventional oils, its uniform molecular structure helps it flow more freely and reduce friction between metal surfaces. Anti-friction additives are included to further improve energy efficiency.
Extends Drain Intervals
AMSOIL Signature Series Synthetic Motor Oil can extend drain intervals far beyond those recommended for conventional oils. Its unique synthetic formulation and long-drain additive system are inherently stable to resist oxidation and neutralize acids over longer periods. Signature Series is designed to deliver outstanding engine protection, cleanliness and performance over extended drain intervals. It reduces vehicle maintenance and waste oil.
Keeps Pistons Clean
Excess piston deposits can lead to pre-ignition and engine knocking, which results in lost power, reduced fuel economy and, in severe cases, engine damage. Signature Series’ premium additives and naturally high resistance to extreme heat help keep pistons clean for maximum engine performance. Signature Series prevents piston deposits 93 percent better than required to meet the latest API standard.**
Excels in Extreme Temperatures
Signature Series resists thermal (heat) breakdown better than conventional and synthetic motor oils. It is heavily fortified with detergent and dispersant additives to help prevent sludge deposits and keep engines clean. Unlike conventional oils, Signature Series contains no wax, staying fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear.
Reduces Oil Consumption and Emissions
Volatility (burn-off) occurs when oil gets hot, causing high oil consumption and emissions. Signature Series resists volatility better than other oils, helping reduce oil consumption and emissions.
AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of gasoline-fueled passenger cars and light trucks. It is recommended for all domestic and foreign vehicles requiring any of the following performance specifications:
0W-20 (ASM): API SN (Resource Conserving), SM…; ILSAC GF-5, GF-4…; ACEA A1/B1; GM dexos1™ (supersedes 6094M) Fortified with detergents that exceed dexos1 sulfated ash specifications; Chrysler MS-6395; Ford WSS-M2C947-A
*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are AMSOIL-engineered for use in the applications shown.
AMSOIL Signature Series Synthetic Motor Oil is compatible with other conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil’s life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.
Aftermarket oil additives are not recommended for use with AMSOIL synthetic motor oils.
Normal Service – Up to 25,000 miles, 700 hours of operation or one year, whichever comes first, in personal vehicles not operating under Severe Service.
Severe Service – Up to 15,000 miles, 700 hours of operation or one year, whichever comes first.
Severe Service: Primarily short trips (less than 10 miles [16 km]); turbo/supercharged engines; commercial or fleet vehicles; excessive idling; first-time use of AMSOIL motor oil in a vehicle with more than 100,000 miles; frequent towing, hauling, plowing or driving in dusty conditions.
Modified engines (non-stock) and those using E85 fuel are excluded from extended drain recommendations.
Change at the vehicle manufacturer’s recommended drain interval outside U.S. and Canada.
AMSOIL Ea® Full-Flow Oil Filters are designed for extended change intervals. With other brands, do not exceed six months or 10,000 miles unless longer intervals are recommended by the vehicle manufacturer.
Check oil regularly to maintain proper fill levels.
AMSOIL Ea® Full-Flow Oil Filters are designed for extended change intervals. They stop smaller particles, flow more oil and last longer than regular filters. For best performance, use AMSOIL Ea Full-Flow Oil Filters.
AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit AMSOIL Limited Warranty - Lubricants.
I really appreciate it when someone knowledgeable comes along and spells it out in such an easy-to-understand manner. Thank you!"Pennsylvania Crude" was just a marketing gimmick by Quaker State. Crude oil is an alphabet soup of materials that are separated and upgraded at the refinery. Crude oil goes into the refining process. Picture a tall distillation column, say 200 ft. high. "Light ends" (propane, butane, natural gasoline) come off the column near the top, "Middles" come off, you guessed it, near the middle of the column and include No. 2 diesel and the paraffins (saturated hydrocarbons aka n-alkanes) that are the base stocks for motor oils. "Bottoms" off the column include parafin wax, heavy fuel oils (No.4 and No. 6) and the dregs - asphaltics. So.......you can take any crude oil from anywhere in the world and run it through a refinery and get all these products. Some minor tweaking may be needed based on how sour (hydrogen sulfide & sulfur conent) the crude is, but my point is that paraffinic base motor oil stocks are the same no matter where the crude oil came from. So to knock "Pennsylvania Crude" as inferior or too high in paraffins is misinformed. Paraffinic base motor oil sticks are superior to those from napthenic stocks.
That "coffee with cream" colored material that collects on the underside of the oil filler cap has nothing to do with where the crude oil came out of the ground. It is an oil-water emulsion that results from water vapor condensation.
So going further, it is the additive package that makes or breaks a motor oil these days. Quaker State may not have the best additive package, but it meets the latest API Standard.
Regarding your question about experiences with AMSOIL, here's one. I had a 98 Aurora. One summer (2004, >100k miles), sitting in dead still traffic on the DC beltway with temps in the upper 90's, my oil pressure warning kept dinging at me every few minutes, until I finally could drive a bit to get the pressure up. The Aurora gave you a pressure measurement in PSI. I brought it to my service guy, and he said the heat thinning out the oil, combined with possibly some engine wear were not allowing the system to maintain oil pressure. I had already surmised that, since I had a full oil pan. He suggested 5W-40 synthetic and I told him I tried 5W-40 but it didn't help. Honestly, I forget whether I had tried synthetic or not, but I either mentioned Mobil 1, or I told him I tried Mobil 1, and he said, "No - "use AMSOIL. We don't carry it, but I think you can get it at... (wherever he said)." His point was that AMSOIL was especially good at not breaking down and maintained viscosity at higher temps. It worked all summer. From then on, that's all we've been using. I used it in a 2005 Buick Rainier from the first oil change, and then 11-1/2 years until we traded it in, and it was solid the whole time. Admittedly, never looked inside the Buick V8, but never had any issues, either.I've been using the 15k mile Amsoil 5W-30 in my 2012 Malibu (good for 15k miles or 6mos with the use of their filter, which I believe is a WIX premium synthetic filter), with the preferred customer thing I have with my dealer where I get the oil at cost ($20 a year), it ends up being about the same cost as Mobil 1 synthetic and I am going 2x the mileage (with the Mobil 1 I was going 4k with the Amsoil I am going 8k.) I have just reached the 4k mi mark and upon checking the oil, I can say it is much cleaner than the Mobil was at 4k, and it has not lost any oil. I am only on the Amsoil bandwagon after the dealer told me about a diesel service truck they have (they are a repair place) that didn't see a lot of miles, but it saw a lot of idling time. They didn't want to change the oil all of the time because of how much it took, and how expensive the filters were. So they used the oil good for 25k miles or 1 year, and had it tested each year. They kept having it tested and it kept coming back good. Until finally on the 7th year they had tested it, Amsoil said that it would need changed within the next year. So they would've had the possibility of going 8 years on this diesel oil change. Now I know our cars are not like a big diesel truck, nor am I planning on going 8 years without changing my oil. But them being able to do so made me jump on the Amsoil bandwagon. Anybody else have thoughts on Amsoil?