Many car manufacturers have specified 30-grade engine oils (5W-30 & 10W-30) for normal operation. Had multi-grade oils been available back in the 1930s and 1940s, they would have specified them rather than recommending seasonal changes with mono-grade oils. Where 10W-30 oils were originally specified, you may safely substitute 5W-30 or 0W-30 oils as these grades are only thinner than 10W-30 when the oil is cold.
0W-30 HDEO
- Chevron Delo 400 Synthetic 0W-30 (CG-4/SH)
- Citgo Citgard SynDurance 0W-30 (CH-4/SJ)
- Mobil Delvac Elite 222 0W-30 (CJ-4/SM)
- Petro-Canada UHP 0W-30 (CK-4/SN)
5W-30 HDEO
- Amsoil HDD 5W-30 (CI-4+/SL)
- Chevron Delo 400 LE Synthetic 5W-30 (CJ-4/SN)
- Mobil Delvac 1 LE 5W-30 (CJ-4/SN)
- Petro-Canada UHP 5W-30 (CJ-4/SN)
- Shell Rotella T6 Multi Vehicle 5W-30 (CK-4/SN)
10W-30 HDEO
- American Refining Group HDDEO SAE 10W-30 (CJ-4/SL)
- Amsoil ACD 10W-30/30 (CI-4+/SL)
- Brad Penn HDEO 10W-30 (CJ-4/SM)
- Chevron Delo 400 XLE Synblend 10W-30 (CK-4/SN)
- Chevron Delo 400 XLE Synblend ISOCLEAN Certified 10W-30 (CJ-4/SM)
- Chevron Delo 400 XLE Synblend 10W-30 (CJ-4/SM)
- Chevron Delo 400 ZFA Synblend 10W-30 (FA-4/SN)
- Citgo Citgard 600 10W-30 (CJ-4/SL)
- Citgo Mystic JT-8 Synthetic Blend 10W-30 (CJ-4/SN)
- Irving IDO Universal 10W-30 (CI-4+/SL)
- Irving IDO Synthetic Blend CJ-4 10W-30 (CJ-4/SN)
- Lubrication Engineers 8130 Monolec 10W-30 (CJ-4/SM)
- Mag 1 Fleet SAE 10W-30 (CH-4/SJ)
- Mobil Delvac 1300 Super 10W-30 (CJ-4/SM)
- Mobil Delvac Elite 10W-30 (CJ-4/SM)
- Mobil Delvac Super FE 10W-30 (FA-4/SN)
- Petro-Canada SHP 10W-30 (CK-4/SN)
- Renewable Lubricants Bio-Fleet HD Plus 10W-30 (CJ-4/SN)
- Shell Rotella T Triple Protection 10W-30 (CJ-4/SM)
- Shell Rotella T4 Triple Protection 10W-30 (CK-4/SN)
- Shell Rotella T5 10W-30 (CJ-4/SM)
- Shell Rotella T5 10W-30 (CK-4/SN)
- Shell Rotella T5 Ultra 10W-30 (FA-4/SN)
- Valvoline All-Fleet Plus 10W-30 (CJ-4/SM)
15W-30 HDEO
- Chevron Delo 400 SD ISOCLEAN Certified 15W-30 (CJ-4/SM)
- Chevron Delo 400 SD ISOCLEAN 15W-30 (CJ-4/SM)