Oil
Prior to the 1990s engine oil contained higher level of Zinc that prevented wear on flat-tappet camshafts. Key is to find an engine oil with higher levels of ZDDP (Zinc).
Canonical Reference
https://www.corvetteforum.com/forums/c3-tech-performance/2484100-list-of-flat-tappet-oils.html
Looking to avoid racing oils, incorrect weights or diesel oils not rated for gas engines. Current shortlist:
| Brand | ZDDP |
| Summit Racing® ZDDP Performance Motor Oil SUM-1-10W30 | $7/qt https://www.summitracing.com/parts/sum-1-10w30 |
| Royal Purple HPS 10w-30 | $9/qt https://royalpurpledirect.com/hps-10w-30-high-performance-street/ https://www.oreillyauto.com/detail/b/hps-4830/chemicals—fluids-16461/oil-16865/motor-oil—full-synthetic-25265/0065378f5577/royal-purple-hps-synthetic-motor-oil-10w-30-1-quart/hps1030/4708229 |
| AMSOIL Z-ROD 10W-30 Synthetic Motor Oil (ZRT) | $12/qt https://www.amsoil.com/p/z-rod-10w-30-synthetic-motor-oil-zrt/?code=ZRTQT-EA |
| Valvoline VR1 10W-30 full synthetic | $10/qt https://www.valvoline.com/our-products/motor-oil/vr1-full-synthetic-racing-motor-oil |
About $7 to $10 per quart
Filters
https://forums.aaca.org/topic/308967-best-oil-filter-for-the-430-engine/
According to RockAuto the correct WIX filter part number is WIX 51049 or Fram PH25
Alternatives:
Interesting because it lists WIX alternatives as 51258, not 51049. Napa is NAPA 1258
Looking at this one, the Napa is 1049
I ended up purchasing a NAPA 1049. However, could not install as it was long and wouldn’t clear the transmission lines. a NAPA 1258 fits just fine.
The 1049 has a height of 5.178 in https://www.napaonline.com/en/p/FIL1049
The 1258 has a height of 4.338 https://www.napaonline.com/en/p/FIL1258