Originally Posted By: Audi Junkie
Originally Posted By: Nickdfresh
Um, no it isn't only "solid (for) 3000" miles:
http://priuschat.com/forums/gen-ii-prius...-1-0w-30-a.html
TBN of 7.4 after almost 5500 miles.^^
"Now before anyone gets too excited, let me say that this oil was in service under very favorable conditions. Most of the time the outside air temperature was 15-25°C. Trip length was almost always over 25 km and around half of the mileage was over 100 km per trip. Speed was mostly around 85-95 km/h on rural roads."
Like I said, if it was a premium oil, it would carry the premium A5 spec.
http://www.lubrizol.com/EuropeanEngineOils/A5B508.html
ACEA A5/B5-08
Overview
ACEA A5/B5 oils are Upper Mainline lubricants. They are designed for use in high performance gasoline and light duty diesel engines that are specifically designed to use a low viscosity oil. These oils may be unsuitable for use in some engines.
ACEA A5/B5 oils are typically low HTHS (≤3.5cP) SAE 5w30 based on API Group III base oils. The main physical and chemical requirements for ACEA A5/B5 are shown below:
Requirement Method Unit Limit
HTHS viscosity CEC L-36-A-90 cP ≥ 2.9 and ≤ 3.5
Sulphated Ash ASTM D874 %wt ≤ 1.6
Phosphorus ASTM D5185 %wt Report
Sulphur ASTM D5185 %wt Report
Evaporation loss (NOACK) CEC L-40-A-93 % ≤ 13
Total Base Number ASTM D2896 mgKOH/g ≥ 8.0
The low HTHS (≤3.5cP) required by ACEA A5/B5 limits the number of additional performance claims that can be coupled with ACEA A5/B5.
Prior to ACEA 2008, ACEA A5/B5 was not usually coupled any OEM specifications. However, Ford has issued a revision to WSS-M2C913-B which raises the minimum ACEA performance level from ACEA A1/B1 to ACEA A5/B5-08. Therefore, in future some ACEA A5/B5-08 engine oils may also meet the requirements of Ford WSS-M2C913-C.
Changes
ACEA A1/B1-08
http://www.lubrizol.com/EuropeanEngineOils/A1B108.html
Overview
ACEA A1/B1 oils are Mainline lubricants. They are designed for use in gasoline and light duty diesel engines that have been specifically designed to use a low viscosity oil. ACEA A1/B1 oils are typically used in older vehicles as they do not provide the minimum performance demanded by the latest OEM specifications. These oils may be unsuitable for use in some engines.
ACEA A1/B1 oils are typically low HTHS (≤3.5cP) SAE 5w30 based on API Group III base oils. The main physical and chemical requirements for ACEA A1/B1 are shown below:
Requirement Method Unit Limit
HTHS viscosity CEC L-36-A-90 cP ≥ 2.9 and ≤ 3.5 xW-20 ≥ 2.6
Sulphated Ash ASTM D874 %wt ≤ 1.3
Phosphorus ASTM D5185 %wt Report
Sulphur ASTM D5185 %wt Report
Evaporation loss (NOACK) CEC L-40-A-93 % ≤ 15
Total Base Number ASTM D2896 mgKOH/g ≥ 8.0
The low HTHS (≤3.5cP) required by ACEA A1/B1 limits the number of additional performance claims that can be coupled with ACEA A1/B1.
Prior to ACEA 2008, ACEA A1/B1 was usually coupled with the Ford specification, WSS-M2C913-B. However, a new edition of this specification has been introduced by Ford which requires a higher minimum ACEA performance level of ACEA A5/B5-08. This will further reduce the range of applications for which ACEA A1/B1-08 oils are suitable.
http://www.castrol.com/castrol/genericarticle.do?categoryId=82915470&contentId=6006933
Castrol SYNTEC 0w30 European Formula is engineered to meet the Mercedes Benz 229.5 specification*. The 0w30 viscosity grade is ideal for winter conditions where low temperature pumpability is required. A unique, low-temperature formulation provides exceptional pumpability in cold weather and allows for unaided engine starts down to -40ºF.
Exceeds all car and light truck manufacturer’s warranty requirements for the protection of gasoline, diesel and turbocharged engines where API SL, SJ, SH, CF or CD is recommended. Exceeds European ACEA: A3, B3, B4; VW 502 00, 505 00; MB 229.1, 229.3, 229.5; BMW LL-01; GM-LLA-025, GM-LL-B-025 and the engine protection requirements of ILSAC GF-3 for API Certified Gasoline Engine Oils
Mr. Junk, the fallacy to your argument is that you are only presenting ACEA specs. Motor oils can meet several specs simultaneously. Mobil 1 0w30 also meets API SM, ILSAC GF-4, Ford WSS-M2C929-A, GM4718, and Chrysler MS6395.
These specs when placed together on the same spider diagram not only overlap the ACEA A5/B5-08 specs, but extends beyond the performance of the ACEA specs on the same spider peformance diagram. These key areas include oxidative thickening, sludge protection, seal compatibility, rust protection, fuel economy, and piston cleanliness. All while maintaining the same wear protection peformance of the ACEA A5/B5-08 spec.
Your fallacy is known as a "false delimma" where you present only two alternatives and create the assumption that the only alternative to the ACEA A5/B5-08 spec is ACEA A1/B1. But as you see Mobil 1 0w30 also meets other specs that offers a greater performance alternative to the ACEA A5/B5-08 argument you have intentionally laid out.
