Synthetic oil recommendations

[honda8&3]

Just got an 07 crf450r, and don't know what I should run for oil. Obviously I'm doing synthetic, and don't know what I should buy. I'm going amsoil so what weight? Thanks

[Z15]

You can use either a 10W-30 or 10W-40 engine oil. I would recommend you go by what the preferred grade is in your owners manual.

10W-30 Synthetic Motorcycle Oil (http://www.amsoil.com/catalog.aspx?GroupID=742&zo=34396)

10W-40 Synthetic Motorcycle Oil (http://www.amsoil.com/catalog.aspx?GroupID=168&zo=34396) <---- When I doubt, use this grade

Shown on page 7 in the Online AMSOIL Catalog (http://www.amsoil.com/lit/g100/g100.aspx?zo=34396)

[flyjum]

not 10w30 its to thin run 10w40 or 20w50

Rotella t diesel oil works great and is cheap.

Like 30% of crf owners run it.

Its 15w40 perfect weight you can also run it in the trans side as well. I recomend a 20w50 or thicker for trans side.

I run rotella in engine
80w bell gear saver in trans.

Change engine oil every 4-6 hours filter every other oil change
Change trans every 8-10 hours depending on how hard you are on clutch and what not.

[raptor660103]

amsoil is the ****. i have always run amsoil. i have a 1998 honda 300ex that has had amsoil in it since new and i have never had to touch it. still has the original piston, rings, cam and clutch. i took it apart for the first time last year to make sure it was 100% cause my son was going to start riding it and it looked band new.

Found this browing the net

Dated, Aug 20 2009, 09:03 AM
Here are the results of the latest S.A.E testing for motorcycle oils.

Brand Viscosity Grade Base Batch Number
AMSOIL MCF 10W-40 Synthetic LB 22259
Bel-Ray EXS 0W-40 Synthetic AF1212
Castrol GPS 10W-40 Synthetic 3011020
Golden Spectro 4 10W-40 Syn/Petro Blend 13264
Lucas High Performance Motorcycle 10W-40 Syn/Petro Blend None indicated on containers
Maxima Maxum 4 10W-40 Syn/Petro Blend 16104
Mobil 1 MX4T 10W-40 Synthetic X2904
Motul 300V Sport 10W-40 Synthetic 20507/A/69093
Pennzoil Motorcycle 10W-40 Petroleum HPLA192024/12143
Royal Purple Max-Cycle 10W-40 Synthetic F02402
Torco T-4SR 10W-40 Synthetic 62395
Valvoline 4-Stroke 10W-40 Petroleum H104C2

Brand Viscosity Grade Base Batch Number
AMSOIL MCV 20W-50 Synthetic LB 22355
Bel-Ray EXS 10W-50 Synthetic AF1319
BMW 15W-50 Synthetic 13286
Castrol GPS 20W-50 Syn/Petro Blend 3006260
Castrol V-Twin 20W-50 Syn/Petro Blend 4103005
Golden Spectro 4 20W-50 Syn/Petro Blend 13036
Golden Spectro American 4 20W-50 Syn/Petro Blend 11838
Lucas High Performance Motorcycle 20W-50 Synthetic None indicated on containers
Mobil 1 V-Twin 20W-50 Synthetic X22H4
Motul 300V Competition 15W-50 Synthetic 20407/A/69015
Pennzoil Motorcycle 20W-50 Petroleum None indicated on containers
Royal Purple Max-Cycle 20W-50 Synthetic H11402
Screamin Eagle Syn3 20W-50 Synthetic 0461301314
Torco T-4SR 20W-50 Synthetic L 58418 LORJB CR
Valvoline 4-Stroke 20W-50 Petroleum F294C1
Yamalube 4-R 10W-50 Syn/Petro Blend 2 x 1494451, 2 x 99071
1235*1515
Actual Viscosity Tests
AMSOIL MCF 10W-40 14.14 Yes
Bel-Ray EXS 0W-40 15.06 Yes
Castrol GPS 10W-40 15.09 Yes
Golden Spectro 4 10W-40 15.91 Yes
Lucas High Performance Motorcycle 10W-40 11.11 No
Maxima Maxum 4 10W-40 14.39 12.5 to <16.3 Yes
Mobil 1 MX4T 10W-40 13.92 Yes
Motul 300V Sport 10W-40 14.01 Yes
Pennzoil Motorcycle 10W-40 13.0 Yes
Royal Purple Max-Cycle 10W-40 13.33 Yes
Torco T-4SR 10W-40 15.03 Yes
Valvoline 4-Stroke 10W-40 14.94 Yes
(Note, Lucas Oil did not pass the minimum specs for actual viscosity)

AMSOIL MCV 20W-50 20.04 Yes
Bel-Ray EXS 10W-50 17.09 Yes
BMW 15W-50 18.15 Yes
Castrol GPS 20W-50 19.52 Yes
Castrol V-Twin 20W-50 19.22 Yes
Golden Spectro 4 20W-50 20.24 Yes
Golden Spectro American 4 20W-50 19.61 Yes
Lucas High Performance Motorcycle 20W-50 18.54 16.3 to < 21.9 Yes
Mobil 1 V-Twin 20W-50 20.9 Yes
Motul 300V Competition 15W-50 17.7 Yes
Pennzoil Motorcycle 20W-50 16.84 Yes
Royal Purple Max-Cycle 20W-50 19.79 Yes
Screamin Eagle Syn3 20W-50 20.3 Yes
Torco T-4SR 20W-50 19.5 Yes
Valvoline 4-Stroke 20W-50 18.14 Yes
Yamalube 4-R 10W-50 19.48 Yes

The results show that all of the oils tested except Lucas High Performance Motorcycle 10W-40 have initial viscosities consistent
with their indicated SAE viscosity grades. Those oils consistent with their indicated SAE viscosity grades are appropriate
for use in applications recommending these grades/viscosities

Ratings for Shear Stability from Best to Least (Rated on both 40W and 50W)
1. Amsoil
2. Bel-Ray
3. Golden Spectro 4
4. Mobil 1
5. Maxima
6. Castrol
7. Valvoline
8. Torco
9. Royal Purple
10. Lucas HP
4 Ball Wear Test Rating from Best to Least
1. Amsoil
2. Mobil 1
3. Motul
4. Torco
5. Maxima
6. Bel-Ray
7. Pennzoil
8. Lucas HP
9. Castrol\
10. Valvoline
11. Golden Spectro
12. Royal Purple
Gear Wear Rating from Best to Least
1. Amsoil
2. Bel-Ray
3. Maxima
4. Valvoline
5. Royal Purple
6. Lucas HP
7. Golden Spectro 4
8. Pennzoil Motorcycle
9. Castrol
10. Mobil 1
11. Motul
12. Torco
Oxidation Stability Rating from Best to Least
1. Amsoil
2. Mobil 1
3. Bel-Ray
4. Maxima
5. Torco
6. Royal Purple
7. Golden Spectro
8. Valvoline
9. Motul
10. Pennzoil
11. Lucas HP
12. Castrol
TBN and Cleanliness Results from Best to Least
1. Amsoil
2. Motul
3. Royal Purple
4. Torco
5. Golden Spectro
6. Mobil 1
7. Valvoline
8. Lucas HP
9. Pennzoil
10. Bel-Ray
11. Maxima
12. Castrol
Foaming Tendencies from Best to Least
1. Amsoil
2. Golden Spectro
3. Torco
4. Royal Purple
5. Lucas Motorcycle
6. Motul (Failed)
7. Castrol (Failed)
8. Maxima (Failed)
9. Valvoline (Failed)
10. Pennzoil (Failed)
11. Bel-Ray (Failed)
12. Mobil 1 (Failed)
Rust Protection Results from Best to Least
Amsoil, Mobil 1, Motul, Torco, Maxima and Lucas HP all tied and passed with 0 spots.
Royal Purple, Pennzoil, Golden Spectro, Valvoline, Bel-Ray and Castrol all failed with 21+ rust spots present.

The following areas were all evalutated:
Wear Protection (4-Ball ASTM D-4172)
High Temperature/High Shear Viscosity
(HT/HS ASTM D-5481)
Gear Performance
(FZG ASTM D-5182)
Oxidation Stability
(TFOUT ASTM D-4742)
Rust Protection
(Humidity Cabinet ASTM D-174
Foam Control (ASTM D-892)
Volatility (NOACK ASTM D-5800)
Viscosity Shear Stability (% Viscosity
Retention after 90 cycles, ASTM D-627
Viscosity Index (ASTM D-2270)
Acid Neutralization (TBN ASTM D-2896)
Zinc Levels (ppm ICP)
Pricing
The overall ranking of all oils tested in the aforementioned tests is as follows:
1. Amsoil
2. Mobil 1
3. BMW
4. Torco T 4SR
5. Golden Spectro 4
6. Screamin Eagle Syn3
7. Golden Spectro American 4
8. Royal Purple Max Cycle
9. Motul 300V
10. Bel-Ray EXS
11. Valvoline 4 Stroke
12. Lucas HP
13. Pennzoil Motorcycle
14. Yamalube 4-R
15. Castrol GPS
16. Castrol V-Twin
Sources:
JASO T 904-98
ASTM Test Methodology Designation: D 892-03
ASTM Test Methodology Designation: D 1748-00
ASTM Test Methodology Designation: D 2270-04
ASTM Test Methodology Designation: D 2896-03
ASTM Test Methodology Designation: D 4172-94 (Reapproved 2004)
ASTM Test Methodology Designation: D 4742-02a
ASTM Test Methodology Designation: D 5182-97 (Reapproved 2002)
ASTM Test Methodology Designation: D 5481-04
ASTM Test Methodology Designation: D 5800-00a
ASTM Test Methodology Designation: D 6278-02

[RTJ]

AMSOIL recommends 0w-40 in an atv

[450Rida]

go with what is recomended in the maual. thats always the best for the bike.